MAX40109

RECOMMENDED FOR NEW DESIGNS

Precision Signal Conditioning AFE for Pressure Sensor Applications

Analog Devices MAX40109 Product Info

10 February 2026 6

Features

Analog Front-End to Interface with Resistive Bridge-Based Pressure Sensors
Temperature Measurement either directly from the Resistive Bridge or from an External Thermistor
Analog Zero-Pressure Offset Compensation
High-Precision PGA Front-End with 20 Gain Options
Analog and Digital Outputs
Digital 1-Wire, Power Line Communication (PLC) and I₂C interfaces

Calibration Memory with Third-Order Polynomial for Compensation from Temperature and Non-Linearity
Internal Electromagnetic Interference (EMI) Rejection
Supply Voltage Range: 3V to 36V
Low 2mA (typ.) Supply Current
Available in TQFN and WLP Packages

Part details & applications

The MAX40109 is a low-power, precision sensor interface SoC that includes a high-precision, programmable Analog frontend (AFE), Analog-to-Digital Converter (ADC), calibration memory, and digital signal processing. It also includes a Digital-to-Analog Converter (DAC) with an output buffer to support analog voltage output and a 4mA–20mA current loop. It is designed for sensor applications such as strain gauges, pressure, force, and temperature.

This Sensor AFE has both analog and digital outputs. The digital 1-Wire/I²C interfaces program the calibration memory, the front-end Programmable gain amplifier (PGA)'s gain, and the internal current source that drives the sensors' bridge. The digital I²C interface can also be used to retrieve the digital output data and generate alarms.

The MAX40109 operates from 3V to 36V, is available inthe thin quad flat no-lead (TQFN) package and waferlevel package (WLP). It is specified over the -40°C to+125°C operating temperature range.

Applications

Pressure Sensors
Strain Gauges
Force Sensors
Temperature Sensors
Wheatstone-Bridge

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