GENERAL DESCRIPTION
The AD8218 is a high voltage, high resolution current shunt amplifier. It features a set gain of 20 V/V, with a maximum ±0.35% gain error over the entire temperature range. The buffered output voltage directly interfaces with any typical converter. The AD8218 offers excellent input common-mode rejection from 4 V to 80 V. The AD8218 performs bidirectional current measurements across a shunt resistor in a variety of industrial and telecom applications, including motor control, battery management, and base station power amplifier bias control.

FEATURES
   High common-mode voltage range
      4 V to 80 V operating
      −0.3 V to +85 V survival
   Buffered output voltage
   Gain = 20 V/V
   Wide operating temperature range: −40°C to +125°C
   Excellent ac and dc performance
      ±100 nV/°C typical offset drift
      ±50 µV typical offset
      ±5 ppm/°C typical gain drift
      110 dB typical CMRR at dc

APPLICATIONS
   High-side current sensing
      48 V telecom
      Power management
      Base stations
      Bidirectional motor control
      Precision high voltage current sources