GENERAL DESCRIPTION

The AD8237 is a micropower, zero drift, rail-to-rail input and output instrumentation amplifier. The relative match of two resistors sets any gain from 1 to 1000. The AD8237 has excellent gain accuracy performance that can be preserved at any gain with two ratio-matched resistors.

FEATURES

Gain set with 2 external resistors

Can achieve low gain drift at all gains

Ideal for battery powered instruments

Supply current: 115 µA

Rail-to-rail input and output

Zero input crossover distortion

Designed for excellent dc performance

Minimum CMRR: 106 dB

Maximum offset voltage drift: 0.3 µV/°C

Maximum gain error: 0.005 (all gains)

Maximum gain drift: 0.5 ppm/°C (all gains)

Input bias current: 1 nA guaranteed to 125°C

Bandwidth mode pin (BW) to adjust compensation

8 kV HBM ESD rating

RFI filter on-chip

Single-supply operation: 1.8 V to 5.5 V

8-lead MSOP package

APPLICATIONS

Bridge amplification

Pressure measurement

Medical instrumentation

Thermocouple interface

Portable systems

Current measurement