GENERAL DESCRIPTION
The AD629 is a difference amplifier with a very high input, common-mode voltage range. It is a precision device that allows the user to accurately measure differential signals in the presence of high common-mode voltages up to ±270 V.

FEATURES
   Improved replacement for: INA117P and INA117KU
   ±270 V common-mode voltage range
   Input protection to
      ±500 V common mode
      ±500 V differential mode
   Wide power supply range (±2.5 V to ±18 V)
   ±10 V output swing on ±12 V supply
   1 mA maximum power supply current

   HIGH ACCURACY DC PERFORMANCE
   3 ppm maximum gain nonlinearity (AD629B)
   20 μV/°C maximum offset drift (AD629A)
   10 μV/°C maximum offset drift (AD629B)
   10 ppm/°C maximum gain drift

   EXCELLENT AC SPECIFICATIONS
   77 dB minimum CMRR @ 500 Hz (AD629A)
   86 dB minimum CMRR @ 500 Hz (AD629B)
   500 kHz bandwidth

APPLICATIONS
   High voltage current sensing
   Battery cell voltage monitors
   Power supply current monitors
   Motor controls
   Isolation