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Current loops are useful for accurately communicating analog signals over long distances. Unlike voltage, current does not vary due to line resistance or capacitance—both which change with cable length. Current loops provide a high level of noise immunity. As a result, they are widely used in electrically noisy environments.

Maxim provides a wide range of products designed for implementing and protecting 4-20mA communication links.

Current Loop Protector

Faulty current loop conditions as well as reverse inputs can easily damage sensor devices. Maxim...

Sensor Output Conditioners

Analog signals from sensors need to be conditioned or prepared for further processing, e.g., for...

HART Modem IC

Highway Addressable Remote Transducer (HART®) technology allows a secondary (digital) signal to ...


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Blogs

Assistant Excellence Conference - It Takes Two

March 11, 2021

The annual Assistant Excellence Conference (AEC) provides professional development for Maxim global assistants and is produced by the Maxim assistant community.

Two Tools to Ease Inductor Selection

March 05, 2021

Learn about two tools to help with power design and inductor selection: Maxim's EE-Sim Design Tool and Würth's REDEXPERT.

Slash Power Dissipation with Maxim’s Industrial Protected Low-Side Digital Output Solution

February 23, 2021

Greatly reduce power dissipation and shrink form factor with a highly robust integrated digital output solution, the MAX14919.

On the Go Vital Monitoring and Gaming Platform

January 13, 2021

This blog explores an application using a low power SIMO PMIC, the world’s smallest solution size and highest system efficiency, and the story behind it.

The Dawn of the Self-Aware Machine

December 10, 2020

What does "The Dawn of the Self-aware Machine" really mean? I am sure many are thinking of the human-like robots seen in the movies as a way to further replace people on the factory floor.

How iButton Devices Facilitate Electric Car Safety

October 29, 2020

Formula Student Germany competitors design fierce electric race cars. They’ve relied on Maxim Integrated’s iButton devices for electric car safety.

How Being Bold Brings Smart Automation Solutions

October 27, 2020

See how the industry’s first true software-configurable universal analog IO solution provides the flexibility to meet industrial automation challenges.

How Performance at the Edge Drives Smarter Manufacturing

October 26, 2020

Maxim Integrated’s Jeff DeAngelis explains how the COVID-19 pandemic has highlighted what’s needed for manufacturing lines to adapt to changing demands.

What Makes Cryptography Easier? Secure Authenticators and Coprocessors

September 17, 2020

See how secure authenticators and coprocessors make it easier for you to integrate cryptography to protect your embedded designs.

Extend the battery life of your vehicle tracker/asset tracker/IoT device 10-fold with Maxim’s ultra-low power GPS solution

September 15, 2020

Full ultra-low power GPS solution using the MAX2769C GNSS L1 receiver, and the MAX32632 ARM Cortex M4 microcontroller

Featured Products

DS8500 HART Modem

DS8500 HART Modem

The DS8500 is a single-chip modem with Highway Addressable Remote Transducer (HART) capabilities...
  • Single-Chip, Half-Duplex Modem Overlays 1200bps FSK Digital Communication on Top of Installed 4mA–20mA Current Loop Infrastructure
  • Digital Signal Processing Provides Reliable Input Signal Detection in Noisy Conditions
  • Standard Component 3.6864MHz Crystal Reduces System Cost
  • Fully Tested and Verified as a HART-Registered Modem IC
  • Integrated Solution Requires Minimal Power and Space
    • 2.7V to 3.6V Operating Voltage
    • 285µA (max) Current Consumption
    • Space-Saving, 5mm x 5mm x 0.8mm, 20-Pin TQFN Package
    • Few External Components Required
Printable Data Sheet Evaluation Kit
MAX15501 Industrial Analog Current/Voltage Output Conditioners

MAX15501 Industrial Analog Current/Voltage Output Conditioners

The MAX15500/MAX15501 analog output conditioners provide a programmable current up to ±24mA, or ...
  • Supply Voltage Up to ±32.5V
  • Output Protected Up to ±35V
  • Programmable Output (Plus Overrange)
    • ±10V
    • 0 to 10V
    • 0 to 5V
    • ±20mA
    • 0 to 20mA
    • 4 to 20mA
  • Current Output Drives 0 to 1kΩ
  • Voltage Output Drives Loads Down to 1kΩ
  • HART Compliant
  • 2ppm Gain Error Drift Over Temperature
  • SPI Interface, with Daisy-Chain Capability
  • Supports +4.096V (MAX15500) or +2.5V (MAX15501) Full-Scale Input Signals
  • Extensive Error Reporting
    • Short-Circuit and Overcurrent Protection
    • Open-Circuit Detection
    • Brownout Detection
    • Overtemperature Protection
  • Fast, 40µs Settling Time
MAX15500 Industrial Analog Current/Voltage Output Conditioners

MAX15500 Industrial Analog Current/Voltage Output Conditioners

The MAX15500/MAX15501 analog output conditioners provide a programmable current up to ±24mA, or ...
  • Supply Voltage Up to ±32.5V
  • Output Protected Up to ±35V
  • Programmable Output (Plus Overrange)
    • ±10V
    • 0 to 10V
    • 0 to 5V
    • ±20mA
    • 0 to 20mA
    • 4 to 20mA
  • Current Output Drives 0 to 1kΩ
  • Voltage Output Drives Loads Down to 1kΩ
  • HART Compliant
  • 2ppm Gain Error Drift Over Temperature
  • SPI Interface, with Daisy-Chain Capability
  • Supports +4.096V (MAX15500) or +2.5V (MAX15501) Full-Scale Input Signals
  • Extensive Error Reporting
    • Short-Circuit and Overcurrent Protection
    • Open-Circuit Detection
    • Brownout Detection
    • Overtemperature Protection
  • Fast, 40µs Settling Time
MAX12900 Ultra-Low-Power 4-20mA Sensor Transmitter

MAX12900 Ultra-Low-Power 4-20mA Sensor Transmitter

The MAX12900 is an ultra-low-power, highly integrated 4-20mA sensor transmitter. The MAX12900 in...
  • Wide Input Supply Range: 4.0V to 36V
  • Ultra-Low-Power Consumption: 170μA (typ)
  • High Linearity: 0.01% (Max Error)
  • High Resolution: Up to 16 Bit
  • Low Drift Voltage Reference: 10ppm/°C max
  • Wide Temperature Range: -40°C to +125°C
  • Small Package: 5mm x 5mm x 0.8mm 32-pin TQFN
MAX12900EVKIT Evaluation Kit for the <a href="/en/products/MAX12900">MAX12900</a>

MAX12900EVKIT Evaluation Kit for the MAX12900

The MAX12900 evaluation kit (EV kit) provides a proven design to evaluate the MAX12900, loop-pow...
  • Loop-powered 4mA–20mA Transmitter with PWM Inputs
  • Robust Operation with Wide Range Of Input Voltages
  • On-Board Microcontroller to Generate Two PWM Inputs and Provide Fault Diagnostic
  • Supports HART and Fieldbus H1 Communication
  • -40°C to +125°C Temperature Range
  • Reverse Voltage Protection
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Windows 7, Windows 8, and Windows 10 Compatible Software

DS8500-KIT Evaluation Kit for the DS8500

The DS8500 evaluation kit (EV kit) provides a convenient and a quick platform to evaluate the DS...
  • The EV Kit Provides Fast and Simple Evaluation by Providing a Total HART Communications Chain on Board
  • Example HART Master and Field Device Circuits Demonstrate Usage in the Two Most Common HART Connection Configurations
  • HART Registered Modem IC
  • On-Board Isolated 4mA–20mA Communications Loop
  • MAXQ622 USB Microcontroller with Demo Firmware
  • External Connections Allow for Advanced Evaluation of the DS8500 in Other Configurations

MAX14626EVKIT Evaluation Kit for the MAX14626

The MAX14626 evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstr...
  • Evaluates Current-Limit Protection
  • Proven PCB Layout
  • Fully Assembled and Tested