GENERAL DESCRIPTION
The AD22057 is a single-supply difference amplifier for amplifying and low-pass filtering small differential voltages (typically 100 mV FS at a gain of 40) from sources having a large common mode voltage.

FEATURES
   Gain of 320. Alterable from x1 to x160
   Input CMR from Below Ground to 6x (VS – 1 V)
   Output Span 20 mV to (VS – 0.2) V
   1-, 2-, 3-Pole Low-Pass Filtering Available
   Accurate Midscale Offset Capability
   Differential Input Resistance 400 kΩ
   Drives 1 kV Load to +4 V Using VS = +5 V
   Supply Voltage: +3.0 V to +36 V
   Transient Spike Protection and RFI Filters Included
   Peak Input Voltage (40 ms): 60 V
   Reversed Supply Protection: –34 V
   Operating Temperature Range: –40°C to +125°C

APPLICATIONS
   Current Sensing
   Motor Control
   Interface for Pressure Transducers, Position Indicators,
      Strain Gages, and Other Low Level Signal Sources
   Accelerometers