Temperature Sensing

Description

There is a very wide range of temperature sensing and control applications in the world today and hence many design alternatives. This solution offers in-depth design information and circuits for building thermal sensing signal chains using the most popular thermal sensors.

Usually the first step in designing a thermal sensing and control system is to determine the temperature range that must be sensed as well as the operating environment. The next step is selecting a thermal sensor. There are four main type of thermal sensors: silicon, thermistor, RTD, and thermocouple. Maxim provides either complete signal chain solutions or integrated ICs that can take the thermal transducer signal, process it, and provide either an analog or digital communication path back to the control device.

Click the design considerations tab to gain an understanding of the key parameters and circuitry needed to build a temperature sensing function. Click the "circuits" or "block diagrams" tab to view reference designs and products suggested for use in various temperature sensing applications.


The first step in designing a temperature sensor circuit is to select the temperature transducer that you are going to use. To do this, you need to know the medium you are measuring (air, water, liquid, solid) and the temperature range that you are measuring. Then you need to know the accuracy of the measurements that you need to make over the measurement range.

Popular thermal transducers include:

  • Thermocouple (range of -180°C to +1300°C)
  • RTD (range -200°C to +900°C)
  • Thermistor (range: -50°C to +150°C)
  • Silicon Sensor (range -20°C to +100°C)

While the range of the sensor that you select must meet that of your application, additional selection criteria generally includes mounting options and cost of both the sensor and the supporting signal chain.

After the transducer is selected, the next step is determining how to extract a usable signal from the transducer and deliver that signal to a controller. The signal extraction circuitry is called the signal chain. For each transducer there are signal chain alternatives, including single chip solutions. Factors in selecting which signal chain to use include accuracy, flexibility, ease of design, and cost.

This page presents some essential design considerations for different popular temperature transducer types.

Thermocouples


Thermocouples are made by joining two wires of dissimilar metals. The point of contact between the wires generates a voltage that is approximately proportional to temperature. Characteristics include wide temperature range (up to +1800°C), low-cost (depending on package), very low output voltage (about 40µV per °C for a K type), reasonable linearity, and moderately complex signal conditioning. Thermocouples require a 2nd temperature sensor (cold-junction compensation) that serves as a temperature reference and signal conditioning requires a look-up table or algorithm correction.

This table shows the output voltage vs. temperature for popular thermocouple types:

Type Temperature Range (°C) Nominal Sensitivity ( µV/°C)
K −180 to +1300 41
J −180 to +800 55
N −270 to +1300 39

The curve below (Figure 1) shows voltage output over temperature range. The curve is reasonably linear, although it clearly has significant deviations from absolute linearity.

Figure 1. Type K thermocouple output voltage vs. temperature.
Figure 1. Type K thermocouple output voltage vs. temperature.

The diagram below shows the deviation from a straight-line approximation, assuming a linear output from 0°C to +1000°C for an average sensitivity of 41.28µV/°C. To improve accuracy, linearity correction can be done by calculating the actual value or by using a lookup table.

Figure 2. Type K thermocouple deviation from a straight-line approximation.
Figure 2. Type K thermocouple deviation from a straight-line approximation.

Measuring temperature with a thermocouple can be challenging if the temperature range is narrow because the output of the thermocouple is so low. It is also complicated because additional thermocouples are created at the point where the thermocouple wires make contact with the copper wires (or traces) that connect to the signal conditioning circuitry. This point is called the cold junction (see Figure 3).

Figure 3. Simple thermocouple circuit.
Figure 3. Simple thermocouple circuit.

A complete thermocouple-to-digital circuit is shown in Figure 4. A precision op amp and precision resistors provide gain to the thermocouple output signal. A temperature sensor at the cold junction location is monitored to correct for cold junction temperature, and an ADC provides output data at the resolution required. In general, calibration is necessary to correct for amplifier offset voltage, as well as resistor, temperature sensor, and voltage reference errors, and linearization must be performed to correct for the effect of the thermocouple's nonlinear temperature-voltage relationship.

Figure 4. Example of a thermocouple signal-conditioning circuit.
Figure 4. Example of a thermocouple signal-conditioning circuit.

Maxim manufactures a dedicated single chip thermocouple interface that performs the signal conditioning functions for a variety of thermocouple types, thus simplifying the design task and significantly reducing the number of components required to amplify, cold-junction compensate, and digitize the thermocouple's output. The IC is listed under the circuits tab.

Maxim Thermocouple Solutions

Maxim offers both single chip and discrete signal chain alternatives for use with thermocouple sensors. Maxim's single chip Thermocouple-to-Digital interface IC is the MAX31855.

Click on the circuits library tab to view IC solutions and the block diagrams tab for further circuit examples. Additional design information is available in the application notes listed under "Tech Docs."

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Resistance temperature detectors - RTDs


RTDs are essentially resistors whose resistance varies with temperature. Characteristics include a wide temperature range (up to 800°C), excellent accuracy and repeatability, reasonable linearity, and the need for signal conditioning. Signal conditioning for an RTD usually consists of a precision current source and a high-resolution ADC. While RTD are fairly standardized their cost can be high depending on the base material. Platinum is the most common RTD material and Platinum RTDs, referred to as PT-RTDs are the most accurate, other RTD materials include Nickel, Copper, and Tungsten (rare). RTDs are available in probes, in surface-mount packages, and with bare leads.

One factor in determining the useful range of the RTD is the RTD package. The RTD can be made by depositing platinum onto a ceramic substrate or using a platinum wire element housed in a package. The difference in expansion rate of the substrate or package versus the platinum element can cause additional error.

For PT-RTDs, the most common values for nominal resistance at 0°C are 100Ω (PT100), 500Ω(PT500) and 1kΩ (PT1000), although other values are available. The average slope between 0°C and +100°C is called alpha (α). This value depends on the impurities and their concentrations in the platinum. The two most widely used values for alpha are 0.00385 and 0.00392, corresponding to the IEC 751 (PT100) and SAMA standards.

The resistance vs. temperature curve is reasonably linear, but has some curvature, as described by the Callendar-Van Dusen equation:

R(T) = R0(1 + aT + bT2 + c(T - 100)T3)

More information about this equation can be found in the Maxim Thermal Handbook.

The diagram below, Figure 5, shows the curve of resistance vs. temperature for a PT100 RTD along with a straight-line approximation using α. Note that the straight-line approximation is accurate to better than ±0.4°C from -20°C to +120°C.


Figure 5. PT100 RTD resistance vs. temperature. Also shown is the straight-line approximation for 0°C to +100°C.

Figure 6, below, shows the error (in degrees) between the actual resistance and the value calculated from the straight-line approximation:


Figure 6. PT100 nonlinearity compared to linear approximation based on the slope from 0°C to +100°C.

Signal conditioning for a simple 2-wire RTD usually consists of a precision resistor (reference resistor) connected in series with the RTD. A current source that forces current through the RTD and the precision reference resistor, and across the inputs of a high-resolution ADC. The voltage across the reference resistor is the reference voltage for the ADC. The ADC's conversion result is simply the ratio of the RTD's resistance to the reference resistance. An example of a simple RTD signal-conditioning circuit is shown in Figure 7.

Several variations are common. The current source may be integrated into the ADC, or the current source may be eliminated and a voltage source may be used to provide bias to the RTD-RREF divider. This approach is not as common as providing a current supply because the voltage supply provides accurate results only when the wires connecting the RTD to circuit have very low resistance.

Figure 7. Simplified RTD signal-conditioning circuit.
Figure 7. Simplified RTD signal-conditioning circuit.

3-Wire or 4-Wire RTD Interface

When the RTD's cable resistance is significant (greater than a few mΩ for a PT100), a 3-wire or 4-wire RTD will generally be used. Four wires allow force and sense connections to the RTD to eliminate the effect of wire resistance. Three wires provide a compromise solution that partially cancels the effect of cable resistance. Linearization is generally done using a lookup table, although external linear circuits can provide good linearization over a limited temperature range.

To measure the resistance of an RTD, a small electric current (about 1 mA) must flow through the sensor to create the necessary voltage drop. The current causes the platinum element in the RTD to heat up above the temperature of the RTD's environment (also called Joule heating). The heating is proportional to the electric power (P=I2R) in the RTD and the heat transfer between the RTD sensing element and the RTD environment.

The most common standards for RTD tolerances are the American standard (ASTM E1137) Grades A and B and European standard IEC 751 Class A or B.

ASTM E1137 IEC 60751 (2008)
Grade Tolerance Class Tolerance
A ±(0.13 + 0.0017 |t|)  A (Class F0.15) ±(0.15 + 0.002 |t|) 
B ±(0.25 + 0.0042 |t|)  B (Class F0.3) ±(0.3 + 0.005 |t|)

Where |t| is the absolute value of temperature in °C

Maxim RTD Solutions

Maxim offers both single chip and discrete signal chain alternatives for use with RTD sensors. Maxim's single chip RTC-to-Digital interface is the MAX31865.

Click on the circuits library tab to view IC solutions and the block diagrams tab for circuit examples. Additional design information is available in the application notes listed under "Tech Docs."

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Thermistor


Thermistors are temperature-dependent resistors, usually made from conductive materials such as metal-oxide ceramics or polymers. The most common thermistors used for temperature sensing have a negative temperature coefficient (NTC) of resistance. Thermistors are available in probes, in surface-mount packages, with bare leads, and in a variety of specialized packages.

Characteristics include moderate temperature range (generally up to +150°C, though some are capable of much higher temperatures), low-to-moderate cost (depending on accuracy), poor but repeatable linearity. The linearity of a thermistor varies significantly over temperature. Over a range of 0° to 70°C thermistor non-linearity can be ±2°C to ±2.5°C while over a range 10° to 40°C typical non-linearity can be ±0.2°C.

A simple, common approach to using a thermistor is to use a voltage divider as shown in Figure 8, where a thermistor and fixed-value resistor form a voltage divider whose output is digitized by an analog-to-digital converter (ADC).

Figure 8. This basic circuit shows how a thermistor can interface to an ADC. Resistor R1 and the thermistor form a voltage divider with a temperature-dependent output voltage.
Figure 8. This basic circuit shows how a thermistor can interface to an ADC. Resistor R1 and the thermistor form a voltage divider with a temperature-dependent output voltage.

NTC thermistors have a large negative temperature coefficient over wide temperature ranges. The relationship between resistance and temperature for a common NTC is shown in Figure 9. This is an issue for both linear and logarithmic correction over wide temperature ranges.


Figure 9. Resistance vs. temperature curves for a standard NTC. Nominal resistance is 10kΩ at +25°C. Note the nonlinearity and large relative temperature coefficient of curve (a). Curve (b) is based on a logarithmic scale and also exhibits significant nonlinearity.

An NTC's nonlinearity over a wide temperature range can affect the choice of the ADC selected to digitize the temperature signal. Since the slope of the curves in Figure 9 decreases significantly at temperature extremes, the effective temperature resolution of any ADC used with the NTC thermistor is limited at those extremes and this often requires the use of a higher resolution ADC.

Combining an NTC with a fixed resistor in a voltage-divider circuit like the one in Figure 8 provides some linearization, as shown in Figure 10. By selecting an appropriate value for the fixed resistor, the temperature range for which the curve is most linear can be shifted to meet the needs of the application.


Figure 10. Making an NTC voltage-divider, as in Figure 9, helps to linearize the NTC's resistance curve over a limited temperature range. The voltages on the NTC and the external resistor, R1, are shown as a function of temperature. Note that the voltage is roughly linear from 0°C to +70°C.

For wide temperature range applications a common approach is to use the Steinhart–Hart equation. This provides a third order approximation. The error in the Steinhart–Hart equation is generally less than 0.02⁰C over a measurement range of 200°C range.

More information about Steinhart-Hart equation can be found in the Maxim Thermal Handbook.

Maxim Thermistor Solutions

Maxim manufactures a few different single chip thermistor based digital output ICs. While the MAX31865 was designed for use with RTDs, it is also a very good choice for use with a thermistor.

Click on the circuits library tab to view IC solutions and the block diagrams tab for circuit examples. Additional design information is available in the application notes listed under "Tech Docs."

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Silicon


Silicon temperature sensors are available with analog or digital outputs. While the range of a silicon sensor is limited, they are easy to use and many have additional features like thermostat functions.

Analog Temp Sensors

An analog temperature sensor is useful in applications where the output needs to be sent through a current loop to a monitoring device. Digital outputs can also be converted in this case, but then the signal goes through two extra conversion steps.

Analog temperature sensor ICs use the thermal characteristics of bipolar transistors to develop an output voltage or, in some cases, current, that is proportional to temperature.

The simplest analog temperature sensors have just three active connections: ground; power supply voltage input; and output. Other analog sensors with enhanced features may have additional inputs or outputs such as a comparator or voltage reference output.

Figure 11 shows a curve of output voltage vs. temperature for a typical analog temperature sensor, the MAX6605. Figure 12 shows the deviation from a straight line for this sensor. From 0°C to +85°C, the linearity is within about ±0.2°C, which is quite good compared to thermistors, RTDs, and thermocouples.

Figure 11. Output voltage vs. temperature for the MAX6605 analog temperature-sensor IC.
Figure 11. Output voltage vs. temperature for the MAX6605 analog temperature-sensor IC.


Figure12. The MAX6605 output voltage deviation from a straight line. Linearity from 0°C to +85°C is approximately ±0.2°C.

Analog temperature sensors can have excellent accuracy. For example, the DS600 has a guaranteed accuracy of ±0.5°C from -20°C to +100°C. Other analog sensors are available with larger error tolerances, but many of these have very low operating current (on the order of 15µA, max) and are available in small packages (e.g., SC70).

Digital Temperature Sensors

Integrating an analog temperature sensor with an ADC is an easy way to create a temperature sensor with a direct digital interface. Such a device is normally called a digital temperature sensor, or a local digital temperature sensor. "Local" refers to the fact that the sensor measures its own temperature, as opposed to a remote sensor that measures the temperature of an external IC or discrete transistor.

Figure 13 shows block diagrams for two digital temperature sensors. Figure 13a illustrates a sensor that simply measures temperature and clocks the resulting data out through a 3-wire digital interface. Figure 13b shows a sensor that includes several additional features, such as over-/under temperature outputs, registers to set trip thresholds for these outputs, and EEPROM.


Figure 13. Block diagrams of local digital temperature sensors. (a) Simple sensor with serial digital output. (b) Sensor with additional functions, such as over-/under temperature alarm outputs and user EEPROM.

One advantage of using a digital temperature sensor is that all of the errors involved in digitizing the temperature value are included within the sensor's accuracy specifications. In contrast, an analog temperature sensor's specified error must be added to that of any ADC, amplifier, voltage reference, or other component that is used with the sensor. A good example of a very high-performance digital temperature sensor is the MAX31725, which achieves ±0.5°C accuracy across a temperature range of -40°C to +105°C. The MAX31725 can be used over a range of -55°C to +125°C temperature range and provides a maximum temperature error of just ±0.7°C with a 16-bit (0.00390625°C) resolution.

Most digital temperature sensors include one or more outputs that indicate that the measured temperature has gone beyond a preset (usually software-programmable) limit. The output may behave like a comparator output, with one state when temperature is above the threshold and the other state when temperature is below the threshold. Another common implementation is for the output to behave as an interrupt that is reset only in response to an action by the master.

Digital temperature sensors are available with a wide variety of digital interfaces including I2C, SMBus™, SPI™, 1-Wire®, and PWM.

Maxim Analog and Digital Silicon-Based Temperature Solutions

Maxim offers a variety of silicon-based temperature sensors with analog or digital output.

Click on the circuits library tab to view IC solutions and the block diagrams tab for circuit examples. Additional design information is available in the application notes listed under "Tech Docs."

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Introduction to the MAX20334 Overvoltage and Surge-Protected Dual SPDT Data Line Switch

This video will provide an introduction to Maxim’s new Overvoltage and Surge-Protected Dual SPDT Data Line Switch – MAX20334.

Introduction to the MAX77827 5.5V 1.5A Ultra Low IQ High Efficiency Buck-Boost Converter

This video provides an introduction to the MAX77827, a 1A capable high-efficiency buck-boost converter with input voltage range from 1.8V to 5.5V. You will also learn how this device packs the highest performance with the industry’s lowest IQ in its class of buck-boost converters.

Introduction to the MAX16152 MAX16153* MAX16154* and MAX16155 nanoPower Supervisor and Watchdog Timer

This video provides an introduction to Maxim’s nanoPower Supervisor and Watchdog Timer family– the MAX16152 – MAX16155.

Smartphones

nanoPower comparators can play a key role in temperature monitoring for portable devices like smartphones.

Monitoring temperature with a micro and thermistor

MAX40000 nanoPower comparator

Temperature monitor using a comparator

Introduction to the MAX30208 Low-Power, High-Accuracy Digital Temp Sensor

This video provides an introduction to Maxim’s low-power, high-accuracy digital temp sensor – the MAX30208.

Introduction to the MAX20079 36V, 3.5A Buck Converter with 3.5µA IQ

This video provides an introduction to the MAX20079 a small, synchronous buck converter with integrated high-side and low-side switches.

Introduction to the MAX40025A 280ps High-Speed Comparator, Ultra-Low Dispersion with LVDS Outputs

This video provides an introduction to Maxim’s 280ps High-Speed Comparator, Ultra-Low Dispersion with LVDS Outputs – the MAX40025C and MAX40026.

Electrical Engineer

A MyMaxim account provides quick online access to rich technical resources.

Introduction to the MAXM86161 Single-Supply Integrated Optical Module for HR and SpO2 Measurement

This video provides an introduction to Maxim’s Single-Supply Integrated Optical Module for heart rate and SpO2 Measurement – the MAXM86161.

Protect Your Power Designs Against Faults in a Single Chip

Learn how Maxim's complete system power protection ICs prevent field failures and unexpected downtime by mitigating the harmful effects of voltage, current, and temperature faults. Our industrial system protection ICs reduce mean time between failures (MTBF) and help save cost and time, all from a single chip.

Learn more: System Power Protection ›

Introduction to the MAX25610A MAX25610B Synchronous Buck and Buck Boost LED Driver/DC-DC Converter

This video provides an introduction to the MAX25610A and MAX25610B, fully synchronous LED drivers that provide constant output current to drive high-power LEDs.

Security Short Subjects (Part 1): The Basics of Authentication

Examine the basics of secure authentication and discover why one-way authentication is not always ideal. You’ll learn how identification and secure authentication work together to provide better cybersecurity.

Learn more: Secure Authentication ›
Watch next part ›

Security Short Subjects (Part 3): Asymmetric Cryptography

Learn the basics of asymmetric key cryptography and see how it is used to encrypt and decrypt data. Review the concepts of public and private keys and learn how to use a key pair to send and receive encrypted data. The differences between symmetric and asymmetric key are also discussed along with the concept of a cipher suite.

Learn more: Secure Authentication ›
Watch next part ›

Security Short Subjects (Part 4): Symmetric Key Authentication

We’ll examine the use of symmetric key cryptography for authentication applications and learn more about the concepts of shared keys, Nonce, and secure hash.

Learn more: Secure Authentication ›
Watch next part ›

Security Short Subjects (Part 5): Asymmetric Authentication

Learn how asymmetric key cryptography is used for authentication and review the concepts of key generation and encryption. You will learn more about digital signatures and how they are used for secure authentication.

Learn more: Secure Authentication ›
Watch next part ›

Security Short Subjects (Part 6): Asymmetric Authentication Details

Review details of asymmetric key cryptography including ECDSA (Elliptic Curve Digital Signature Algorithm) and learn how it is used in asymmetric key-based authentication. See why asymmetric key authentication is vital for applications such as communication, IP protection, and medical device authentication.

Learn more: Secure Authentication ›
Watch next part ›

Security Short Subjects (Part 7): Symmetric Authentication Details

Examine more of the details of symmetric key cryptography for authentication applications including the concepts of nonce, random numbers, and secure hash. You’ll learn how to use secure hash for authentication.

Learn more: Secure Authentication ›
Watch next part ›

Security Short Subjects (Part 2): Symmetric Cryptography

Learn the basics of symmetric cryptography and how it is used to encrypt and decrypt data. Examine concepts of plaintext and cyphertext and see how a secret key sends and receives encrypted data.

Learn more: Secure Authentication ›
Watch next part ›

Security Short Subjects (Part 8): Secure Firmware Download for Embedded Systems

Learn how firmware can be securely downloaded to a remote system and see how ECDSA key pair generation and SHA-256 algorithm are used for this purpose.

Learn more: Secure Authentication ›
Watch from the beginning ›

Factory Robotics

Industrial communications ICs with isolation support industrial automation equipment.

Evaluation Kit for 60V, 3A Adjustable Current Limiter

MAX17613AEVKIT

4.5V to 60V, 3A with overvoltage, undervoltage protection with reverse current blocking.

Learn More ›

Evaluation Kit for 60V, 6A Adjustable Power Limiter

MAX17526AEVKIT

5.5V to 60V, 6A with overvoltage/undervoltage, reverse protection, and power limit.

Learn More ›

Evaluation Kit for 60V, 1A Adjustable Current Limiter

MAX17608EVKIT

4.5V to 60V, 1A, overvoltage/undervoltage protection with reverse-current blocking

Learn More ›

TWS earbud and cradle with USB charging

Block diagram of a TWS earbud and cradle with USB charging.

TWS earbud

TWS earbud and cradle with USB and wireless charging.

Smartphone

Smartphone for Seniors Gets Smarter with Health Monitoring

RFID Datalogger for Healthcare and Cold-Chain Logistics

MAXREFDES300#

Wireless (RFID) datalogger with a low-power microcontroller and a passive temperature sensor.

RFID Datalogger for Healthcare and Cold-Chain Logistics

MAXREFDES300#

Wireless (RFID) datalogger with a low-power microcontroller and a passive temperature sensor.

2.5V/10A, Synchronous Step-Down Converter Using the MAX20098-MAXREFDES1205

The MAXREFDES1205 demonstrates how to build a DC-DC buck converter using the MAX20098 step-down controller for 2.5V DC output applications from a 4.5V to 16V input.

2.5V/10A, Synchronous Step-Down Converter Using the MAX20098-MAXREFDES1205

The MAXREFDES1205 demonstrates how to build a DC-DC buck converter using the MAX20098 step-down controller for 2.5V DC output applications from a 4.5V to 16V input.

MAXNANOPWRBD# evaluation kit

MAXNANOPWRBD# provides a fully assembled and tested kit for evaluating an array of ultra-low-power ICs.

16-Bit Delta-Sigma ADC Peripheral Module

MAX11205PMB1

Interfaces the MAX11205 ultra-low-power, 16-bit ADC to any system that utilizes Pmod-compatible expansion ports configurable for GPIO interface.

Learn more ›

1-Wire Grid-Eye Sensor

MAXREFDES131

Sensing solution featuring the Panasonic AMG8833 Grid-EYE® and the Maxim 1-Wire® bus, enabled by the DS28E17.

Learn more ›

Building Automation Shield

MAXREFDES130

Arduino form-factor, Mbed™-enabled shield, includes 0VDC-10VDC analog outputs, 4–20mA input/output, latching/nonlatching relays, RTC, and 1–Wire master.

Learn more ›

MAX44000PMB1: Peripheral Module

Microsoft Word - MAX44000PMB1-quick-start_gs2.docx,MAX44000PMB1

Ambient and Infrared Proximity Sensor Peripheral Module

Learn more ›

Pmod Adapter for Arduino Platform

MAXREFDES72

Arduino to Pmod shield with integrated level-shifting and pin-multiplexing.

Learn more ›

Display Driver Shield

MAXREFDES99

Arduino form-factor shield daisy-chains four MAX7219 LED drivers to drive a 16x16 LED array for signage applications.

Learn more ›

Full-Bridge DC Motor Driver Mbed Shield

MAXREFDES89

Mbed-compatible, Arduino form-factor shield for brushed DC motor applications. Drives up to 4 motors with current regulation while operating from a single 7V to 36V power supply.

Learn more ›

1-Wire Shield

MAXREFDES132

A platform for interfacing with 1-Wire® devices, 1-Wire evaluation kits (EV kits), and iButton® devices.

Learn more ›

DeepCover Embedded Security in IoT Authenticated Sensing and Notification

MAXREFDES143

Demonstrates an authenticated data chain from a protected sensor node to a web server.

Learn more ›

MAXREFDES143

Ultra Compact Development Board Fits in the Tightest Spaces, Reduces Power

MAX32625PICO

Power-optimized Arm® Cortex®-M4F. On-board PMIC provides all necessary voltages. Ultra-compact 0.6in x 1.0in dual-row header footprint.

Learn more ›

Development Platform for the Ultra-Low Power Microcontroller for Wearables

MAX32630FTHR

Power-optimized Arm® Cortex®-M4F. Optimal Peripheral Mix Provides Platform Scalability. On-Board Bluetooth® 4.0 BLE Transceiver with Chip Antenna.

Learn more ›

Evaluation Kit for the DS28E38 DeepCover Secure Authenticator

DS28E38EVKIT

ECDSA asymmetric authentication with ChipDNA PUF protection and 2Kb user EEPROM.

Learn More ›

Evaluation Kit for the MAX66242 DeepCover Secure Authenticator

MAX66242EVKIT

Includes ISO 15693, I2C, SHA-256 tag/transponder with 4Kb user EEPROM, RF/I2C interface and energy harvesting.

Learn More ›

DS3231MZEVKIT Board Photo

Evaluation Kits for the DS3231M or DS3232M (±5ppm, I2C Real-Time Clock)

DS3231MZEVKIT Board Photo

Evaluation Kits for the DS3231M or DS3232M (±5ppm, I2C Real-Time Clock)

Isolated 12V to 5.5V 22W No-Opto Flyback Power Supply

MAXREFDES124

Compact 12V input module with secondary-side synchronous MOSFET driver that features 5.5V at 4A output.

Learn more ›

Isolated 24V to 5V, 12.5W No-Opto Flyback Power Supply

MAXREFDES120

Compact 24V input module with secondary-side synchronous MOSFET driver that features 5V at 2.5A output.

Learn more ›

Isolated 24V to 5V, 9W No-Opto Flyback Power Supply

MAXREFDES119

Compact 24V input module with secondary-side synchronous MOSFET driver that features 5V at 1.8A output.

Learn more ›

How to Safely Demagnetize Your Inductive Load Using SafeDemag

Travis and Cynthia show how to use SafeDemag™ to safely and quickly demagnetize your inductor when using switching inductive loads. They explain inductive switching and the differences in freewheel diodes, zener clamps, active clamps, and Maxim’s SafeDemag solutions.

Learn more: MAX14912EVKIT ›

Secondary-Side Synchronous MOSFET Driver for Flyback Converters

MAX17606

4.5V to 36V input, high-current driver improves efficiency and thermal management.

Learn more ›

7A Sink/3A Source Current, 8ns, SOT23, MOSFET Driver

MAX5048C

Accepts logic-input signals and drives a large external MOSFET, ideal for high-frequency switchers.

Learn more ›

4A Sink/Source Current, 12ns, Dual MOSFET Driver

MAX17600

Fast switching time with short propagation delay, ideal for high-frequency circuits.

Learn more ›

LED headlights

MAX25610A/B LED drivers enable highly efficient and compact LED lighting applications.

Creating Autonomous Seismic Recording Solutions

 

"The power/performance and fidelity are two of the ingredients that made the MAX11216 attractive to us.”
 - Richard Degner, CEO and President, GTI


Featured products: MAX11216, MAX6126, MAX4736, MAX14689, MAX7315

Read Their Story ›

Radio Bridge

Radio Bridge develops long-range, low-cost wireless sensor solutions for a variety of end markets.

Radio Bridge

Radio Bridge develops long-range, low-cost wireless sensor solutions for a variety of end markets.

24μA IQ Stand-Alone Fuel Gauge with Protector

MAX17301XEVKIT

Evaluates 1-cell ModelGauge m5 EZ pack-side fuel gauges with protector and SHA-256 authentication.

Learn more ›

Designing Small, Low-Power Analog Input Modules

 

"GSEE-TECH is excited for this opportunity to partner with Maxim, offering a perfect solution in our analog input block with a very small size and multi-signal support, enhancing the user experience and user accessibility.”
 - Li Yan, Fieldbus PM of Marketing, GSEE-TECH


Featured product: MAX11270

Read Their Story ›

5.1μA 1-Cell Fuel Gauge with ModelGauge m5 EZ and Optional High-Side Current Sensing

MAX17260XEVKIT

Evaluates the stand-alone ModelGauge™ m5 host-side fuel-gauge ICs for lithium-ion (Li+) batteries in handheld and portable equipment.

Learn more ›

5.1μA Multi-Cell Fuel Gauge with ModelGauge m5 EZ

MAX17261XEVKIT

Monitors a multiple-series cell battery pack with an external resistor divider.

Learn more ›

Nanopower Ideal Diode vs. a Schottky Diode

Srudeep demonstrates the advantages of using the MAX40203 nanopower ideal diode versus a Schottky diode, highlighting features such as forward voltage drop, forward leakage current, and reverse leakage current. He shows how the MAX40203 has considerably lower error, which complements 1.8V battery applications.

Learn more: MAX40203 ›

24μA IQ Stand-Alone Fuel Gauge with Protector

MAX17301XEVKIT

Evaluates 1-cell ModelGauge m5 EZ pack-side fuel gauges with protector and SHA-256 authentication.

Learn more ›

Building an Energy-Efficient, Maintenance-Free House

 

"3.2W of clean I2S audio from a MAX98357A Class D amplifier means the best sound in the least space for a Raspberry Pi or other I2S sources”
 -Martin Winston, Editor, Newstips Bulletin


Featured products: MAX98357A, MAX44009

Read Their Story ›

Delivering Louder, Richer Sound from Micro Speakers

 

"Having the MAX98390 in my toolbox to increase the ability of our micro speakers makes my job easier and our customers much happier—which is the ultimate goal.”
 -Michael Van Den Broek, Senior Applications Engineer, PUI Audio


Featured product: MAX98390

Read Their Story ›

Helping Listeners Feel Music 

 

“We wanted a high-quality, reliable, and highly efficient (audio amplifier) solution, and Maxim’s MAX98357A had all of the features we needed.”
 -Jukka Linjama, CTO and Partner, Flexound Systems


Featured product: MAX98357A

Read Their Story ›

Designing Function-Rich Diving Computers

 

"The MAX4257 is the best component I know on the market, with a very small package, very low noise, high gain, and very low power consumption.”
 - Vittorio Loggia, Electronic Designer and Product Manager, ROJ


Featured products: MAX4257, MAX17112, MAX4983E, MAX77801, and MAX6778

Read Their Story ›

Safer, Easier Mobile Payments

 

"Maxim is an outstanding vendor in terms of safety in the industry. Using the MAX32555 provides a strong safety guarantee for us."
 -Marco Ma, Beijing Weipass Panorama Information Technology Co.


Featured product: MAX32555

Read Their Story ›

Portable Ultrasound for Remote Care

 

“The MAX2082 transceiver is optimized for high-channel count, high-performance portable and cart-based ultrasound systems.”
 -Anakin Choung, COO, Healcerion Co.


Featured products: MAX2082, MAX4968B

Read Their Story ›

Solar Power in Shady Places

 

“Maxim’s junction box integrated cell-string optimizer has given us maximum design and layout flexibility to put panels on multiple roof planes without compromising performance.”
 -Anand Janaswamy, SVP, Product Development and Utilization at OneRoof Energy


Featured products: Cell-string optimizers

Read Their Story ›

Cost-Effective, Efficient Solar 

 

“The JinkoMX modules (with Maxim cell-string optimizers) provide technology that helps mitigate shading issues at a price point below other alternatives.”
 -Caleb Arthur, CEO, Missouri Sun Solar


Featured products: Cell-string optimizers

Read Their Story ›

Scalable, Virtual Medical Care 

 

“We were looking to disrupt one of the biggest industries of the world—healthcare—and we’re doing it with Maxim sensors and processors.”
 -Dr. Samir Qamar, Founder and CEO, MedWand Solutions


Featured products: Maxim sensors, processors, and power management, and audio ICs

Read Their Story ›

Enabling Independence with Dignity

 

“The key decision point on these [Maxim] ICs was the ability to get the best possible fuel gauge and battery state information.”
 -Jon Guy, VP of Engineering, UnaliWear


Featured products: MAX77818, MAX17201, MAX44009, MAX2693, MAX8969, MAX16125 dual pushbutton controllers, MAX8841 LDO voltage regulators, MAX14634 bidirectional battery switches

Read Their Story ›

Protecting PIN Pad Transactions

 

“My relationship with Maxim started many years ago. It’s a very successful one because Maxim offers a complete system, deep expertise in PCI-PTS requirements, and good local support.”
 -Jorge Ribeiro, CEO, Gertec


Featured products: MAX32550

Read Their Story ›

Fast, Modular Design System

 

“Using our revolutionary rhomb.io system, designers can meet their needs in the shortest time.”
 -Pedro Pelaez, Technical Director, TNFG


Featured products: MAX30101, MAX44005, MAX8814, voltage regulators, and optical bio analog front-end

Read Their Story ›

Making Clothes Smarter

 

“Maxim support enabled us to use these parts effectively, and we created a design that is more or less without compromise.”
 -Dylan Jackson, Lead Embedded Engineer, Spire


Featured products: MAX30110 and MAX17223

Read Their Story ›

Meeting Food Quality Criteria

 

"For our purpose, the iButton is the perfect choice because it’s so small, robust, and can be reused many times.”
 -Dr. Thijs Defraeye, Laboratory for Biomimetic Membranes and Textiles, Empa


Featured product: DS1922L

Read Their Story ›

Remote Health Monitoring

 

"Maxim believes in the wearable world and is working to bring out more technology that minimizes the real estate required.”
 -Dan Atlas, Co-founder and CTO, ATLASense Biomed


Featured products: Various Maxim ICs

Read Their Story ›

Delivering Tiny PoE Devices

 

“The Maxim peak-current-mode controller is only 3mm x 3mm. Because of its size and its high level of integration, we were able to reduce our whole module size by about half.”
 -Devesh Agarwal, CEO, Infomart


Featured products: Maxim peak-current-mode controller

Read Their Story ›

Boosting Sight for the Visually Impaired

 

“It’s all the little things that Maxim helped us with which add up to make a significant difference.”
 -Patrick Antaki, Co-Founder and President, Evergaze


Featured products: Maxim lens driver, MAX44009, MAX8834, MAX77818, Maxim overvoltage protector ICs

Read Their Story ›

Designing Flexible, Long-Range Wireless IoT Sensors

 

"Working with the Maxim team allowed us to accelerate things and, in aggregate, get ahead of schedule by nearly a month.”
 -Steve Kilts, CEO, Radio Bridge


Featured product: MAX31856

Read Their Story ›

Educating and Empowering Musicians

 

"The Maxim team has saved some mistakes that would have led to extra prototyping cycles. We expect our finished guitar will have long battery life and provide accurate data on remaining charge.”
 -Bobcat Cox, Chief Technology Officer, Zivix


Featured products: MAX14636, MAX14699, MAX8903C, MAX17260, MAX38643, and MAX38902E

Read Their Story ›

Do-It-Yourself IoT Chips

 

"The MAX77734 is a great chip for managing different power rails in wearables and space-constrained designs.”
-Omar Alnaggar, Director of Hardware Engineering, zGlue


Featured product: MAX77734

Read Their Story ›

Automating Patient Glycemic Control

 

"Maxim’s security ICs, including the DS28E83 and DS28E38 secure authenticators, enable us to ensure that the medication cartridges for our artificial pancreas will be used as intended and deliver the right dosages to the right patients.”
 -Jeff Valk, CEO, Admetsys


Featured products: DS28E83, DS28E38

Read Their Story ›

Redefining Motion Capture

 

"Maxim ICs are making our products work in a more stable and reliable manner.”
-Dr. Tristan RuoLi Dai, CTO, Noitom


Featured products: MAX17224, MAX14841E, MAX809S, MAX14527, MAX8887, DS3231M, MAX8881

Read Their Story ›

Creating High-Quality Smart Metering Solution

 

"MAX22445 helped us pass meter type tests with more stringent requirements than IEC.”
 -Joe Leong Kok Keen, Staff Design Engineer, Hardware, EDMI


Featured product: MAX22445

Read Their Story ›

Facilitating Reliable Semiconductor Production

 

"Maxim provides highly integrated functions and performance that our customers require with a reasonable price.”
 -Byoung Gi Kim, CTO, R&D, Digital Frontier


Featured product: MAX9972

Read Their Story ›

Fully Integrated Synchronous Buck Converter

Smart Building System

Building automation technology

Power management ICs help support effective building automation technologies.

36V, 600mA Mini Buck Converter with 3.5µA IQ

MAX20075

Synchronous buck with integrated high-side and low-side switches delivers up to 0.6A from 3.5V to 36V input, while using only 3.5µA quiescent current at no load.

Learn more ›

Peripheral Module for ±5ppm, I2C Real-Time Clock

DS3231MPMB1

Interfaces the DS3231M RTC low-cost and extremely accurate RTC to any system that utilizes Pmod™-compatible expansion ports configurable for I²C.

Learn more ›

Evaluation System for Precision Thermocouple to Digital Converter with Linearization

MAX31856EVSYS

Includes MAX31856PMB1 peripheral module, adaptor board for communication with the software and K-type thermocouple.

Learn more ›

Industry's Only ASIL-Grade Camera Protector with integrated I2C-Based Diagnostics

MAX20087

Dual/quad camera power protector ICs deliver up to 600mA load current to each of their four output channels.

Learn more ›

Evaluation Kit for I2C Temp Sensor with ±2°C Accuracy Low-Power I2C Temperature Sensor in WLP Package

MAX31875EVKIT

Includes GUI that provides communication over I2C with an on-board master IC.

Learn more ›

Serial Communications Module for Evaluation Kits

DS3900P2EVKIT

Provides bidirectional communication with 2-wire and 3-wire devices using a PC's serial port to evaluate a wide variety of ICs.

Learn more ›

Ultra-Small 3.2MHz Dual 500mA Versatile PMIC for Camera Modules

MAX20019

2.2MHz and 3.2MHz dual step-down converters with integrated high-side and low-side MOSFETs.

Learn more ›

2.2MHz Sync and Dual Step-Down Converters

MAX20014

OUT1 boosts the input supply up to 8.5V at up to 750mA, while two synchronous step-down converters operate from a 3.0V to 5.5V input voltage range and provides a 0.8V to 3.8V output voltage range at up to 3A.

Learn more ›

36V, 600mA Mini Buck Converter with 3.5µA IQ

MAX20076

Synchronous buck with integrated high-side and low-side switches delivers up to 0.6A from 3.5V to 36V input, while using only 3.5µA quiescent current at no load.

Learn more ›

Evaluation Kit for WPC/PMA Dual Mode Wireless Power Receiver

MAX77950EVKIT

Wireless power receiver that operates using near-field magnetic induction when coupled with a WPC or PMA transmitter and provides output power up to 12 watts.

Learn more ›

Evaluation Kit for 4.5V to 42V, 300mA uSLIC Power Module for 3.3V Output

MAXM15462EVKIT

Integrated power solution providing 3.3V from a wide input range of 4.5V to 42V with up to 300mA of current.

Learn more ›

4V to 42V, 100mA, Compact Step-Down Power Module

MAXM17532

The MAXM17532 is a step-down DC-DC power module built in a compact uSLICTM package. The MAXM17532 integrates a controller, MOSFETs, an inductor, as well as the compensation components. The device operates from an input voltage of 4.0V to 42V, supports an adjustable output voltage from 0.9V to 5.5V, and supplies up to 100mA of load current. The high level of integration significantly reduces design complexity, manufacturing risks and offers a true “plug and play” power supply solution, hence reducing the time-to-market.

Evaluation Kit for 4V to 42V, 100mA uSLIC Power Module for 5V Output

MAXM17532EVKIT

Integrated power solution providing 5V from a wide input range of 10V to 42V with up to 100mA of current.

Learn more ›

Arm Cortex-M4F Development Platform with Expansion Connectors for Battery-Powered Devices

MAX32620FTHR

Mbed-enabled development platform for the MAX32620 ultra-low-power microcontroller. On-board PMIC, fuel gauge, peripherals, and Pmod™ connectors enable rapid development with a small 0.9in x 2.0in board.

Evaluation Kit for the MAXM17575 5V Output Application

MAXM17575EVKIT

Integrated power solution providing 5V from a wide input range of 7.5V to 60V with up to 1.5A of current.

Learn more ›

Evaluation Kit for the MAXM17761 5V Output-Voltage Application

MAXM17761EVKIT

Integrated power solution providing 5V from a wide input range of 4.5V to 76V with up to 1A of current.

Learn more ›

Evaluation Kit for the MAXM17574 5V Output Application

MAXM17574EVKIT

Integrated power solution providing 5V from a wide input range of 10V to 60V with up to 3.0A of current.

Learn more ›

3µA 1-Cell/2-Cell Fuel Gauge with ModelGauge

MAX17048EVKIT

Smallest, lowest power fuel gauge with proven, voltage-only ModelGauge algorithm.

Learn more ›

DeepCover Secure Authenticator Demonstration Kit

MAXAUTHDEMO

Hardware/software platform that demonstrates the functional capabilities of Maxim's Secure Authenticators in genuine use-case scenarios.

Learn more ›

Stand-Alone ModelGauge m5 Fuel Gauges with SHA-256 Authentication EZ

MAX17201GEVKIT

Offers nonvolatile memory (NVM) for pack-side, single-cell or multi-cell applications.

Learn more ›

7µA 1-Cell Fuel Gauge with ModelGauge m5 EZ

MAX17055XEVKIT

Combines coulomb counting and voltage fuel gauging for highest SOC accuracy.

Learn more ›

18-Bit Precision Data Acquisition System

MAXREFDES74

Performs High-Speed, Precision Data Acquisition with High-Accuracy, Low-Power Data Converters.

Learn more ›

Evaluation Kit for the MAXM17503 in a 5V/2.5A Output Application

MAXM17503EVKIT

Integrated power solution providing 5V from a wide input range of 11V to 60V with up to 2.5A of current.

Learn more ›

Evaluation Kit for the MAXM17502 in a 5V/1A Output Application

MAXM17502EVKIT

Provides 5V from a 12V to 60V input and delivers up to 1A at over 84% efficiency.

Learn more ›

Evaluation Kit for the MAX1510

MAX1510EVKIT

Evaluates the Low-Voltage DDR Linear Regulator

Learn more ›

Evaluation Kit for the MAX17651

MAX17651EVKIT

Demonstrates the 60V, 100mA, Ultra-Low Quiescent Current, Linear Regulator

Learn more ›

16-Bit Four-Channel Analog Input Micro PLC Card

MAXREFDES61

Complete Analog Front-End for Next-Gen Ultra-Small PLCs with Isolated Power and Data.

Learn more ›

Isolated Power Supply Reference Design

MAXREFDES9

3.3V to 15V Input, ±15V (±12V) Output Isolated Power for Industrial and Medical Applications

Learn more ›

Evaluation Kit for MAXM17515 in a 1.5V/5A Output Application

MAXM17515EVKIT

Provides 1.5V from a 2.4V to 5.5V input and delivers up to 1.5A at over 91% efficiency.

Learn more ›

Complete Evaluation Board for Ultra-Low Power Cortex-M4F Microcontroller

MAX32620-EVKIT

Power-optimized Arm® Cortex®-M4F. Optimal peripheral mix provides platform scalability. On-board bluetooth® 4.0 BLE transceiver with chip antenna.

Evaluation Board for Defibrillation/Surge/ESD Protector for Medical and Industrial Applications

MAX30034EVKIT

Fully tested board includes MAX30034 to absorb repetitive defibrillation and other high-energy pulses.

Learn more ›

Analog-Rich Arm Cortex-M3 Development Platform

MAX32600MBED

Mbed™-enabled evaluation system for the MAX32600 ultra-low-power micro with advanced analog features and hardware security. Arduino connectors and prototyping space enable rapid development.

Learn more ›

Cryptographic Controller for Embedded Devices Development Platform

MAXQ1061 Evaluation Kit - Evaluates: MAXQ1061

Credit card-sized socketed board allows for communication and power through a 10-pin connector to an optional host adapter.

Learn more ›

Smart Force Sensor

MAXREFDES82

Industrial sensor displays weight and center of mass for objects placed on the platform, up to 780g.

Learn more ›

Wearable, Galvanic Skin Response System

MAXREFDES73

GSR measurement detects human skin impedance under different situations.

Learn more ›

GPS/GNSS Ultra-Low-Noise-Figure LNA

MAX2667EVKIT

Lowest noise figure GPS LNA delivers high gain and high linearity in a tiny package.

Learn more ›

Evaluation Kit for the MAX44298

MAX44298EVKIT

Assesses the MAX44298 precision power monitor with very low offset for low-side monitoring.

Learn more ›

Evaluation Kit for GPS/GNSS Ultra-Low Current LNA

MAX2679/MAX2679B EV Kits - Evaluates: MAX2679/MAX2679B

Enables testing of RF performance with no additional circuitry. Provides 50Ω SMA connectors for inputs and outputs.

Learn more ›

40MHz to 4GHz Linear Broadband Amplifier

MAX2615

High-performance broadband amplifier with exceptional gain flatness in an 8-pin TDFN.

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DeepCover Embedded Security in an IoT: Public-Key Secured Data Paths

MAXREFDES155

Secures IoT systems with a public-key-based authenticated data chain from a protected sensor node to a web server.

24-Bit Weigh Scale

MAXREFDES75

High-accuracy weigh scale reference design performs small-signal 24-bit measurements, and produces a weighted 0 to 10V output proportional to the input signal.

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Evaluation Kit for the MAX44284

MAX44284EVKIT

Demonstrates the high-precision real-time current monitoring of the MAX44284 current-sense amplifier.

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High-Precision, Long-Battery Life Heat/Flow Meter

MAXREFDES70

Low-power, ultrasonic time-of-flight reference design for high-accuracy liquid flow measurement.

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Arm Cortex-M4F Development Platform Optimized for Bluetooth®-Based Battery-Powered Devices

MAX32630FTHR

Mbed-enabled development platform for the MAX32630 ultra-low-power microcontroller. On-board PMIC, Bluetooth, and peripherals enable rapid development with a small 0.9in x 2.0in board.

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Health Sensor Platform

MAXREFDES100

mbed-enabled sensor platform for rapid evaluation of wearable health and fitness solutions. Measures motion, temperature, biopotential, pulse oximetry, and heart rate.

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4–20mA 2-Wire Current-Loop Sensor

MAXREFDES15

Ultra-low power, high-accuracy loop-powered sensor transmitter that connects to any standard PT1000 resistance sensor and converts the linearized temperature to a 4–20mA current signal.

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4–20mA Loop-Powered Temperature Sensor with Hart

MAXREFDES16

2-wire, loop-powered smart temperature transmitter solution for temperature measurement. Works with any type of RTD, from PT100 to PT1000.

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Isolated 24V to 3.3V 33W Power Supply

MAXREFDES121

Isolated, industrial power-supply reference design with an efficient active-clamp topology design with 24V input.

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ECT/EPT Current Fault Sensor

MAXREFDES38

High-accuracy analog front-end for ECT/EPT low-power sensors to increase precision of grid health data and fault location.

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Universal Input Micro PLC

MAXREFDES67

Universal analog input accepts analog voltage and current, all RTD configurations and thermocouples to collect high-accuracy analog data using a single architecture.

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MAXREFDES150: POCKET IO PLC DEVELOPMENT PLATFORM

MAXREFDES150

Industry 4.0, the fourth revolution in manufacturing and process automation, poses a considerable challenge for PLC design engineers who are required to pack more functionality into enclosures that keep getting smaller.

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Isolated, 24V to 12V, 20W Power Supply Reference Design

MAXREFDES113

Compact, 24V input, flyback converter module with 12V at 1.6A output and pre-qualified transformers.

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Non-isolated 24V to 5.1V, 20W Power Supply

MAXREFDES125

High-efficiency, 20W power supply for industrial and broad power-supply applications.

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Isolated, 24V to 5V, 10W Power Supply Reference Design

MAXREFDES114

Compact, 24V input, forward converter module with 5V at 2A output and pre-qualified transformers.

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Heart-Rate and Pulse-Oximetry Monitor

MAXREFDES117

A low power, optical heart-rate module complete with integrated red and IR LEDs, and a power supply.

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Dual-Channel Current Sense Peripheral Module

MAXREFDES77

Interfaces the MAX44285 dual-channel high-side current-sense amplifier to any system that utilizes Pmod™-compatible expansion ports.

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Non-isolated 5V/2.5A PoE Powered Device Power Supply

MAXREFDES98

This non-isolated PoE powered device design combines a PD controller and buck converter on a 1.2 in2 board. It accepts 36V to 57V input with 5V output up to 2.5A.

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Power Amplifier Biasing through MAX11300 PIXI IC

MAXREFDES39

This design uses a MAX11300 programmable mixed-signal I/O (PIXI™), to bias and monitor a power amplifier for an RF base station.

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IO-Link® 16 Channel Digital Input Hub

MAXREFDES36

This IO-Link® 16-channel digital input reference design includes a 16-bit micro with IO-Link device stack and fits on a small 53.75mm x 72mm PCB.

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Pocket IO™ PLC Development Platform

MAXREFDES150

Integrates 30 industrial IOs for lower heat dissipation and faster throughput in less than ten cubic inches.

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Secure Authentication Design with 1-Wire ECDSA and Xilinx Zynq SoC

MAXREFDES44

Protects IP and authenticates peripherals to Xilinx Zynq™ FPGAs.

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SHA-256 Secure Authentication Design

MAXREFDES34 (Alcatraz)

This design implements SHA-256 authentication function using the 1-Wire protocol.

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Non-isolated 12V/1A PoE Powered Device Power Supply

MAXREFDES108

This non-isolated PoE powered device design combines a PD controller and buck converter on a 1.2 in2 board. It accepts 36V to 57V input with 12V output up to 1A.

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Isolated 24V to 5V, 2W Flyback Power Supply

MAXREFDES111

Industrial power-supply reference design features an efficient flyback topology with 24V input, and a 5V output at 2W of power (0.4A)

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Smart Force Sensor

MAXREFDES82

Operates as Both a Weigh Scale and a Touch Interface with Force Sensing for Industrial Applications.

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3.3V and 5V PoE Powered Device

MAXREFDES31 (Pasadena)

This design is an IEEE 802.3af/at compliant. Powered Device (PD). In addition to regulating power received over Ethernet, device can also be powered from a wall adapter.

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4-Port IO-Link Master

MAXREFDES79

4-Port IO-Link Master Reference Design Description: Four IO-Link ports allow for simultaneous testing of four different sensors or actuators.

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Introduction to the MAX40077 MAX40078 MAX40089 Single/Dual/Quad Ultra-Low Input Bias Current, Low Noise Amplifiers

This video provides an introduction to the MAX40077/MAX40078/MAX40089 are wide band, low-noise, low-input bias current operational amplifiers that offer rail-to-rail outputs and single-supply operation from 2.7V to 5.5V.

Introduction to the MAX40242 20V, Low Input Bias-Current, Low-Noise, Dual Op Amplifier

This video provides an introduction to the MAX40242 which provides a combination of high voltage, low noise, low input bias current in a dual channel and features rail-to-rail at the output.

Ultra-Low-Power, Stereo Audio Codec

MAX9867

Includes stereo differential microphone inputs integrated with an auxiliary battery-measurement ADC and capacitorless headphone amps.

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The Ins and Outs of Voltage Supervisor ICs

Low-Power Supervisory Circuit with Battery Backup.

The Ins and Outs of Voltage Supervisor ICs

The MAX16140 4-bump WLP Package.

Boosted Class D Amplifier with Automatic Level Control

MAX98502

Operates at 2MHz and delivers constant 2.2W output power without collapsing battery.

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Ultra-Low Power Stereo Audio Codec

MAX98090

High-performance, ultra-low power consumption, and small footprint make it ideal for portable applications.

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Mono 3.2W Smallest Class D Amplifier

MAX98304

0.95mA IQ at 3.7V (1.2mA at 5V), offers five selectable gain settings set by a single gain-select input (GAIN) in 1mm x 1mm package.

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Boosted Class-D Amplifier with Integrated Dynamic Speaker Management

MAX98390

Dynamic Speaker Management (DSM) provides louder and deeper audio while increasing micro speaker sound clarity.

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Tiny, Low-Cost, PCM Class D Amplifiers with Class AB Performance

MAX98357A

Easy-to-use, low-cost, digital PCM input amplifier provides industry-leading Class AB audio performance with Class D efficiency.

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High-Sensitivity Pulse Oximeter and Heart-Rate Sensor

MAX30102

Pulse Oximeter and Heart-Rate Biosensor for Wearable Health

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1A Linear Li+ Battery Charger with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN

MAX8808X/Y/Z

Simplest and Smallest Charging Solution for Hand-Held Equipment

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High-Efficiency Buck-Boost Regulator

MAX77801

The MAX77801 is a high-current, high-efficiency buck-boost targeted to mobile applications that use a Li-ion battery or similar chemistries. The MAX77801 utilizes a four-switch H-bridge configuration to support buck and boost operating modes. Buck-boost provides 2.60V to 4.1875V of output voltage range and up to 2A output current.

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Wearable Charge Management Solution

MAX14676

This battery-charge-management solution includes a linear battery-charger with 28V tolerant input, smart power control, and several power-optimized peripherals. A boost regulator with 5V to 17V output, and 3 programmable current sinks can drive a variety of LED configurations.

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Industry's Smallest 1.55A 1-Cell Li+ DC-DC Charger

MAX8971

This device charges quickly with minimal heat generation. It charges from variety of adapters and maximizes Safety featuring JEITA-compliant temperature monitoring and withstands transient inputs up to 22V.

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ModelGauge m3 Fuel Gauge

MAX17047/MAX17050

These battery fuel gauges provide excellent short-term and long-term accuracy by using both coulomb counting and voltage-based ModelGauge algorithms. ModelGauge m3 cancels offset accumulation error in the coulomb counter while providing better short-term accuracy than any purely voltage-based fuel gauge.

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USB/AC Adapter, Li+ Linear Battery Charger

MAX8606

This complete 1-cell Li+ battery charge-management IC operates from either a USB port or AC adapter. It integrates a battery disconnect switch, current-sense circuit, PMOS pass element, and thermal-regulation circuitry, while eliminating the external reverse-blocking Schottky diode, to create a simple and small charging solution.

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3µA 1-Cell Fuel Gauge with ModelGauge

MAX17048

Maximize Battery Run-Time with Industry's Smallest Size, Lowest Power Fuel Gauge

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7µA 1-Cell Fuel Gauge with ModelGauge m5 EZ

MAX17055

ModelGauge m5 EZ Eliminates Battery Characterization

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7µA 1-Cell Fuel Gauge with ModelGauge m5 EZ

MAX17055

Low IQ fuel gauge for precision measurements of current, voltage, and temperature.

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Wearable Power Management Solution for Primary Cells

MAX20310

Wearable Power Management for Single-Cell Zinc Air, Silver Oxide, and Alkaline Battery Architectures

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Wearable Charge-Management Solution

MAX14690

Extends Battery Life of Wearable Electronics

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WPC/PMA Dual-Mode Wireless Power Receiver

MAX77950

Power receiver IC provides precision output current and voltage-sensing scheme over entire load range.

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Secure Authenticator with SHA-256 Coprocessor

DS2465

Secure authenticator features 1-Wire master with SHA-256 and memory functionality.

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Secure Authenticator with 1-Wire SHA-256 and 512-Bit User EEPROM

DS28E15

Secure authenticator features factory-programmed, unique 64-bit ROM identification number.

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Secure Authenticator with Elliptic-Curve Public-Key Authentication

DS28C36

Secure authenticator features true random number generator, secured EEPROM, and ROM ID

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Ultra-Low-Power PMIC with 3-Output SIMO

MAX77650

PMIC features SIMO buck-boost regulator and a 150mA LDO.

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Secure Coprocessor with Elliptic-Curve Public-Key Authentication

DS2476

Secure ECDSA and HMAC SHA-256 coprocessor companion to the DS28C36.

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Dual Input, Power Path, 3A Switching Mode Charger

MAX77818

High-performance companion PMIC with ModelGaugeTM m5 fuel gauge technology.

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Why Shrinking Sizes of RTCs Is Good News for Your Portable Designs

Layout of crystal with integrated capacitors (left) and two integrated capacitors with crystal equivalent circuit (right).

Smartwatch clock

Small, low-power RTCs are ideal for compact, portable designs.

Introduction to the MAX17301 and MAX17311: 1-Cell ModelGauge m5 EZ Fuel Gauge with 2-Level Protector and SHA-256 Authentication

This video provides an introduction to Maxim’s 1-Cell ModelGauge m5 EZ Fuel Gauge with 2-Level Protector and SHA-256 Authentication—the MAX17301 and MAX17311.

Introduction to the DS28C40 Deep Cover Automotive I2C Authenticator

This video provides an introduction to Maxim’s Secure Authenticator for Automotive – the DS28C40.

Introduction to the MAXM15062-63-64-65-66-67-MAXM15462-63-64-65-66-67-MAXM17901-03-04-05-06 4.5V to 24V, 42V, 60V 300mA Himalaya uSLIC™ Step-Down Power Modules

This video provides an introduction to Maxim’s 300mA Himalaya uSLIC step-down power modules.

Introduction to the MAX31341B Low-Current, Real-Time Clock with I2C Interface and Power Management

This video provides an introduction to Maxim’s Low-Current, Real-Time Clock with I2C Interface and Power Management – the MAX31341B.

Introduction to the MAX17302 MAX17312 1-Cell ModelGauge m5 EZ Fuel Gauge with Protector and SHA-256 Authentication

This video provides an introduction to the MAX17302/MAX17312, a 24μA IQ stand-alone pack-side fuel gauge IC with protector and SHA-256 authentication for 1-cell lithium-ion/polymer batteries.

High-Efficiency Buck-Boost Regulator with 5A Switches

MAX77816

98% efficiency with I2C interface for single-cell Li-ion battery-powered applications.

20A User-Configurable Quad-Phase Buck Converter

MAX77812

91% efficiency with 3.4MHz high-speed I2C and 30MHz SPI interface, optimized for single-cell battery-powered applications.

[Sales Rep] Technical Training Basic 2019 Power Protection

"Technical Basic Training course presenting the basic of what system protection is, why it is needed, and the current challenges for system engineer trying to implement full system protection. This is a newer version of a previous one"

[Sales Rep] Technical Training Basic 2019 - Offset and Gain Error

Technical Basic Training course presenting the causes of Offset and Gain Errors in operational amplifiers and other devices in a typical signal chain and how to mitigate these errors through calibration.

[Sales Rep] Technical Training Basic 2019 ESD Tutorial

Technical Basic Training course presenting an overview of Electrostatic Discharge and how to protect the integrated circuits from that phenomenon.

[Sales Rep] Technical Training Basic 2019 - Frequency Synthesizer

Training course presenting an overview of Frequency Synthesizer using Phase Locked Loop method.

[Sales Rep] Technical Training Basic 2019 Understanding DAC Specifications

Technical Basic Training course explaining the key specifications of Digital to Analog converters.

[Sales Rep] Technical Training - Basic Curriculum 2019

This curriculum contains six courses: DAC Specifications, Frequency Synthesizers, ESD, Power Protection, NFC/RFID, Signal Chain Offset and Gain Errors

MAX22500E eye diagram

MAX22500E is the industry’s fastest RS-485 transceiver with pre-emphasis for robust communications over longer cables.

MAX22500E

The MAX22500E RS-485 transceiver IC supports a data rate of 100Mbps over 10m of Cat5e cable.

Industrial Control System

RS-485 is an ideal communications standard for noisy industrial environments.

Introduction to the MAX38904A/B/C/D 2A Low Noise LDO Linear Regulator in TDFN

This video provides an introduction to Maxim's Low Noise LDO Linear Regulator in TDFN - the MAX38904A MAX38904B MAX38904C MAX38904D.

Introduction to the MAX25600 Synchronous High Voltage 4 Switch Buck Boost LED Controller

This video provides an introduction to the MAX25600, a synchronous 4-switch buck-boost LED driver controller.

Enabling a Healthier World with the MAX30101 Biosensor Solution and Raku-Raku Smartphone

Fujitsu Connected Technologies Limited has added a healthcare functionality to its Raku-Raku Smartphone, which is ideal for first-time smartphone users. The company expects smartphones to make seniors more aware of their heath and to provide clues to improve their living habits. With analysis of pulse wave data, which can be obtained from the MAX30101 pulse-oximeter and heart-rate sensor, the company created a feature to diagnose the age of blood vessels and to assess stress levels.

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ProtoCentral MAX86150 breakout board

Quickly prototype mobile health applications with breakout boards like ProtoCentral’s MAX86150 board.

ProtoCentral MAX30003 breakout board

Breakout boards like ProtoCentral’s MAX30003 product help you quickly evaluate and test-drive the MAX30003 biopotential AFE.

MAX17263

How to Select and Configure a Battery Fuel Gauge for Your Portable System

Travis explains how to choose a battery fuel gauge and battery characterization model. He demonstrates the ModelGauge m5’s EZ Configuration GUI which does not require characterization for most battery chemistries, using the MAX17263GEVKIT.

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Suhel Dhanani, business development director, Industrial & Healthcare Business Unit, at Maxim

Small, efficient ICs help drive the industrial IoT.

Industrial IoT application

Small, efficient, and rugged ICs are critical components in an IIoT application.

Simon Wu

Maxim Summer Interns Showcase Their Technical Talents

Maxim’s summer 2019 interns showcase their talents in areas including electrical engineering, finance, marketing, and legal.