Low-Power, Precision Instrumentation Amplifier with Programmable Gain

The MAX41400 is a low-power, high-precision instrumentation amplifier with programmable gain through input pins.

Available in a space-saving, 9-bump wafer-level package (WLP) with a 0.4mm bump pitch, it is designed for use in portable medical and industrial sensor applications. The device features internal EMI filters to protect from RF disturbances and EMI. The internal fixed gain can be selected from 10V/V to 250V/V. The gain-setting resistors are located inside the device, thus minimizing gain drift variations over the temperature range.

The MAX41400 features rail-to-rail CMOS inputs and outputs; a 28kHz, -3dB bandwidth at just 65µA (typ) supply current; and 25µV (max) zero-drift input offset voltage over time and temperature. The zero-drift feature eliminates the high 1/f noise typically found in CMOS input amplifiers, making it useful for a wide variety of low-frequency measurement applications.

The MAX41400 operates from a 1.7V to 3.6V power supply voltage and is specified over the −40°C to +125°C automotive temperature range.

Applications

* EKG Medical Devices

* Insulin and Infusion Pumps

* Low-Power Sensor Interface

* Pressure, Weight, Force Sensors

* RTD Temperature Sensors

* Wearable Devices

* Supply Voltage Range: 1.7V to 3.6V* Very Low 25µV (max) Input Offset Voltage* Low 65µA Quiescent Current* Rail-to-Rail Inputs and Outputs* EMIRR

* >100dB at 1800MHz, 2400MHz* >90dB at 900MHz