General Description

The MAX9939 is a general-purpose, differential-input programmable-gain amplifier (PGA) that is ideal for conditioning a variety of wide dynamic range signals such as those found in motor current-sense, medical instrumentation, and sonar data acquisition applications. It features SPI™-programmable differential gains from 0.2V/V to 157V/V, input offset-voltage compensation, and an output amplifier that can be configured either as a high-order active filter or to provide a differential output.

Features

♦ SPI-Programmable Gains: 0.2V/V to 157V/V

♦ Extremely Low Gain Tempco

♦ Integrated Amplifier for R/C Programmable Active Filter

♦ Input Offset-Voltage Compensation

♦ Input Protection to ±16V

♦ 13µA Software Shutdown Mode

♦ -40°C to +125°C Operating Temperature Range

♦ 10-Pin µMAX Package

Applications

  Sensorless Motor Control

  Medical Signal Conditioning

  Sonar and General Purpose Data Acquisition

  Differential to Single-Ended Conversion

  Differential-Input, Differential-Output Signal Amplification

  Sensor Interface and Signal Processing