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Wearable temperature sensor ICs are digital thermometers which provide clinical-grade accuracy combined with ultra-low power operation to support wearable fitness and medical applications, such as wrist watches, medical patches, and smart clothing. Our wearable digital thermometers accurately and quickly measure skin temperature for wearable technologies. When compared to discrete sensors, our integrated wearable temperature sensor ICs offer clinical-grade accuracy, lowest power consumption, and the smallest size, with flexible fitness and medical wearable assembly options.

Key Features Include:

  • Accurate and repeatable measurement of contact temperature
  • Low-power operation for wearable applications
  • Clinical-grade measurement accuracy

Featured Videos


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Technical Documentation

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Technical Documents

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Part Number Title Document Type Date

MAX86176 Ultra-Low-Power, Optical PPG and Single-Lead ECG AFE

The MAX86176 is a complete photoplethysmogram (PPG) and electrocardiogram (ECG) analog front-end...

PPG (MAX86176)

  • Complete Dual-Channel Optical-Data Acquisition System
  • Ultra-Low-Power Operation for Wearable Devices
    • Optical Readout Channel < 11μA (typ) at 25fps
    • 14.6μs to 117.1μs ADC Integration Time
    • Low Shutdown Current < 1μA (typ)
  • Signal to Noise Ratio (SNR) up to 110dB with Average (Avg) Mode and Off-Chip Filtering
  • Supports Frame Rates from 1fps to 2kfps
  • High-Resolution 20-bit Charge-Integrating ADCs
  • Low Dark-Current Noise of < 50pARMS
  • Excellent Ambient Range and Rejection Capability
    • > 100μA Ambient Photodiode Current
    • > 90dB Ambient Rejection at 120Hz (Avg > 2)

ECG (MAX86176/MAX30005)

  • Clinical-Grade ECG AFE with High-Resolution ADC
    • 15.6 ENOB with 0.6μVRMS Noise over 0.05Hz to 40Hz
  • Very Low Input-Bias Current (-40°C to +85°C)
    • 233fARMS Input-Current Noise (0.05Hz to 40Hz, TA = +25°C)
  • Fully Differential Input Structure with CMRR > 110dB at Power-Line Frequencies
  • High-Input Impedance > 1GΩ for Extremely Low Common to Differential-Mode Conversion
  • High DC-Offset Range of ±1300mV (typ 1.8V) Allows a Wide Variety of Electrodes to be Used
  • High AC-Dynamic Range of > 90mVP-P Helps Prevent Saturation in the Presence of Motion
  • ECG Biopotential Channel Can Be Used for Some EEG Applications
    • Higher-Gain Ranges Available (480V/V, 960V/V)
    • Low Input-Referred Voltage and Current Noise Enables Use of Small-Area Dry Electrodes

SYSTEM

  • Shutdown Current of 0.5μA (typ)
  • 256-Word FIFO for ECG and PPG
  • True Synchronous ECG and PPG Data from Dedicated Signal Paths
  • Two Fully Configurable Interrupts
  • High-Speed SPI Interface or I2C Interface
  • Small 2.728mm x 2.708mm WLP Package
MAXM86146 Complete Optical Biosensing Module with Ultra-Low-Power Biometric Sensor Hub

MAXM86146 Complete Optical Biosensing Module with Ultra-Low-Power Biometric Sensor Hub

The MAXM86146 is the world’s smallest highly-integrated, optical data acquisition system. It com...
  • Complete Biometric Sensor Hub
    • Supports Simultaneous Wrist-Based Pulse Heart Rate (WHRM) and Pulse Blood Oxygen Saturation (WSpO2) Measurements
    • Integrated MAX86141 Dual-Channel Optical AFE
    • Integrated MAX32664C Arm® Cortex®-M4 based MCU
    • Two Integrated 3.8mm2 PIN Photodiodes
      • Can Operate Independently (Two Channels)
      • Can Be Combined to Give a Total Radiant Area of 7.6mm2 for Additional Flexibility
    • Excellent SNR Enables Measurements on a Wide Range of Users
      • Dynamic Range > 90dB in White Card Loop- Back Test (Sample-to-Sample Variance)
      • Dynamic Range Extendable to > 104dB for SpO2 and > 110dB for HRM with Multiple Sample Modes and On-Chip Averaging
    • Convenient Solution Enables Faster Time-to-Market
    • Ultra-Small 4.5mm x 4.1mm x 0.88mm, 38-Pin OLGA Package Size
  • World-Class Algorithm for Wearable Applications
    • Supports Multiple Accelerometer Options to Allow Robust Detection and Rejection of Motion Artifacts
    • Both Raw and Processed Data are Available
    • FIFO Provides Minimal Host Interaction
    • Ultra-Low Power for Body Wearable Devices
      • AFE Only Requires 10μA Typical at 25sps
      • MCU Supports Deep-Sleep Mode, Allowing Device to Sleep Between Measurements.
      • Automatic Exposure Control (AEC) Algorithm Adjusts the Optical AFE Settings, Maximizing SNR while Minimizing Power Consumption
MAX30208 ±0.1°C Accurate, I<sup>2</sup>C Digital Temperature Sensor

MAX30208 ±0.1°C Accurate, I2C Digital Temperature Sensor

The MAX30208 operates from a 1.7V to 3.6V supply voltage, and is a low-power, high-accuracy digi...
  • High Accuracy and Precision
    • ±0.1° C Accuracy from +30°C to +50°C
    • ±0.15°C Accuracy from +0°C to +70°C
  • Low Power Consumption
    • 1.7V to 3.6V Operating Voltage
    • 67μA Operating Current During Measurement
    • 0.5μA Standby Current
    • 15ms Integration Time
  • Small Size
    • 2mm x 2mm x 0.75mm, 10-Pin Thin LGA
  • Safety and Compliance
    • High and Low Temperature Alarms
  • Digital Interface
    • Configurable Convert Temperature Input Pin
    • Configurable Interrupt Output Pin
    • 32-Word FIFO for Temperature Data
    • 4 I2C Addresses Available—More Addresses Available by Request
    • Unique ROM IDs Allow Device to be NIST Traceable
MAX86140 Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor for Wearable Health

MAX86140 Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor for Wearable Health

The MAX86140/MAX86141 are ultra-low-power, com- pletely integrated, optical data acquisition sys...
  • Complete Single-Channel, Optical Data Acquisition System
  • Optimized Architecture for Transmissive and Reflective Heart Rate or SpO2 Monitoring
  • Low Dark Current Noise of < 50pA RMS (Sample to Sample Variance)
  • Lower Effective Dark Current Noise Achievable Through Multiple Sample Modes and On-Chip Averaging
  • High-Resolution, 19-bit Charge Integrating ADC
  • Three Low-Noise, 8-Bit LED Current DACs
  • Excellent Dynamic Range >89dB in White Card Loop-Back Test (Sample-to-Sample Variance)
  • Dynamic Range Extendable to >104dB for SpO2 and >110dB for HRM with Multiple Sample Modes and On-Chip Averaging
  • Excellent Ambient Range and Rejection Capability
    • > 100µA Ambient Photodetector Current
    • > 70dB Ambient Rejection at 120Hz
  • Ultra-Low-Power Operation for Body Wearable Devices
    • Low-Power Operation, Optical Readout Channel <10µA Typical at 25sps
    • Short Exposure Integration Period of 14.8µs, 29.4µs, 58.7µs, 117.3µs
    • Low Shutdown Current = 0.6µA (typ)
  • Rejection of Fast Ambient Transients
  • Miniature 2.048 x 1.848mm, 5 x 4 0.4mm Ball Pitch WLP
  • -40°C to +85°C Operating Temperature Range
MAXM86161 Single-Supply Integrated Optical Module for HR and SpO<sub>2</sub> Measurement

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

The MAXM86161 is an ultra-low-power, completely integrated, optical data-acquisition system. On ...
  • Complete Single-Channel Optical Data Acquisition System
  • Built-In Algorithm Further Enhances Rejection of Fast Ambient Transients
  • Optimized Architecture for Reflective Heart Rate and SpO2 Monitoring
  • Low Dark Current Noise of < 50pA RMS (Sample-to-Sample Variance)
  • Lower Effective Dark Current Noise Achievable through Multiple Sample Modes and On-Chip Averaging
  • High-Resolution 19-bit Charge Integrating ADC
  • Three Low-Noise 8-Bit LED Current DACs
  • Excellent Dynamic Range > 89dB in White Card Loop-Back Test (Sample-to-Sample Variance)
  • Excellent Ambient Range and Rejection Capability
    • > 100μA Ambient Photodetector Current
    • > 70dB Ambient Rejection at 120Hz
  • Ultra-Low-Power Operation for Wearable Devices
    • Low-Power Operation, Optical Readout Channel < 10μA, Typical at 25sps
    • Short Exposure Integration Period of 14.8μs, 29.4μs, 58.7μs, 117.3μs
    • Low Shutdown Current = 1.6μA (typ)
  • Miniature 2.9mm x 4.3mm x 1.4mm, 14-pin OLGA Package
  • -40°C to +85°C Operating Temperature Range

Reference Designs

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MAX30208EVSYS

Provides a single platform to evaluate the MAX30208 temperature sensor with ±0.1°C accuracy.
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MAX30205EVSYS

Includes USB-to-I2C controller and GUI program to simplify evaluation
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MAX31856EVSYS

Includes MAX31856PMB1 peripheral module, adaptor board for communication with the software and K...
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MAX31875EVKIT

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