GENERAL DESCRIPTION

The AD8228 is a high performance instrumentation amplifier with very high gain accuracy. Because all gain setting resistors are internal and laser trimmed, gain accuracy and gain drift are better than can be achieved with typical instrumentation amplifiers.

FEATURES

Easy to use

Pin strappable gains of 10 and 100

Wide power supply range: ±2.3 V to ±18 V

DC specifications (B Grade, G = 10)

  2 ppm/°C gain drift

  0.02% gain error

  50 μV maximum input offset voltage

  0.8 μV/°C maximum input offset drift

  0.6 nA maximum input bias current

  100 dB CMRR

AC specifications

  650 kHz, –3 dB bandwidth (G = 10)

  2 V/μs slew rate

Low noise

  8 nV/√Hz, @ 1 kHz (G = 100)

  0.3 μV p-p from 0.1 Hz to 10 Hz (G = 100)

APPLICATIONS

Weigh scales

Industrial process controls

Bridge amplifiers

Precision data acquisition systems

Medical instrumentation

Strain gages

Transducer interfaces