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