1-, 2-, 4-Channel, Ultra-Low Power Electrochemical Sensor AFEs

Electrochemical Sensor AFE, Providing Both DC Current Measurements and Electrochemical Impedance Spectroscopy (EIS)

Please check latest availability status for a specific part variant.


The MAX30131/MAX30132/MAX30134 are 1, 2 and 4 channel (respectively) ultra-low power programmable analog front ends (AFE) for use with electrochemical sensors. The devices provide the biasing and complete measurement path, including the analog to digital converters (ADCs). The flexibility of the MAX30131/MAX30132/MAX30134 enables them to work with both two and three terminal electrochemical sensors, providing both DC current measurement and electrochemical impedance spectroscopy (EIS) measurement capability. The devices include an internal temperature sensor and programmable voltage reference, support external temperature monitoring and an external reference source and integrate voltage monitoring of bias and supply voltages for safety and compliance.

The MAX30131/MAX30132/MAX30134 support single-, dual-, and quad- two-terminal or three-terminal electrochemical sensors, respectively. Ultra-low power allows for the continuous biasing of the sensor to maintain accuracy and fast response when a measurement is required. The MAX30131/MAX30132/MAX30134 operate over a 1.7V to 5.0V voltage range. Total current consumption can be less than 5μA depending on the configuration, measurement frequency, and number of sensors. Communication is through a 4-pin SPI serial interface plus a configurable interrupt pin and four configurable general purpose input/outputs (GPIOs) for direct control of internal functions.

The MAX30131/MAX30132/MAX30134 are available in a 25-bump WLP package and operate over a 0°C to +70°C temperature range.

Design Solution: Choose an Electrochemical AFE with a Sweet Spot For Continuous Glucose Monitoring ›

Key Features

  • Multichannel Operation
    • Up to Four ndependent DC Channels
    • 1 Switchable EIS Channel
  • High Accuracy and Precision
    • Up to Four 12-Bit Voltage DACs
    • Up to Four 16-Bit Current ADCs
      • Programmable 0.8pA to 30pA Resolution
    • One 16-Bit EIS ADC
      • Programmable 0.014Hz to 27kHz Sine Wave Drive
    • 12-Bit Voltage System ADC
    • 16-Bit Temperature Sensor
    • Programmable, 30ppm/°C Voltage Reference
  • Autonomous Modes with 256 Word Configurable FIFO and Programmable Alarm
  • Long Battery Life for 2- and 3-Terminal Sensors
    • 3.5μA Continuous Bias Supply Current for Single 2- or 3-Terminal Sensor
    • Add 0.25μA for Each Additional Sensor
  • Small Size
    • 25-Bump WLP 2.93 x 2.93mm
  • Safety and Compliance
    • Monitor Sensor Bias Voltages for Compliance
    • Monitor Supply/Battery Voltage and Temperature
  • Simple and Robust Digital Interface
    • 8MHz 4-Wire SPI Interface
    • Programmable Interrupt
    • Four Programmable GPIOs
  • IEC61000-4-2 ESD: ±15kV Air, ±8kV Contact On Sensor Pins


  • Electrochemical Sensors
  • Continuous Glucose Monitors
  • Sweat Sensors
  • Wearable Devices

See parametric specs for Electrochemical Sensors (3)

Part NumberApplicationsISUPPLY
Shutdown Mode Supply Current
ChannelsFeaturesOper. Temp.
Continuous Glucose Monitors
Electrochemical Sensors
Wearable Patient Monitors
Cyclic Voltammetry
Sensor Detect
Temp Sensor
0 to +70
MAX30132 4.32
MAX30134 5.84

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX30134EVSYS: Evaluation System for the MAX30131/MAX30132/MAX30134
Request Reliability Report for: MAX30131 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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