AD8237 Instrumentation Amplifier

By Analog Devices Inc 89

AD8237 Instrumentation Amplifier

ADI's 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.

The AD8237 employs the indirect current feedback architecture to achieve a true rail-to-rail capability. Unlike conventional in-amps, the AD8237 can fully amplify signals with common-mode voltage at or even slightly beyond its supplies. This enables applications with high common-mode voltages to use smaller supplies and save power.

The AD8237 is an excellent choice for portable systems. With a minimum supply voltage of 1.8 V, a 115 μA typical supply current, and wide input range, the AD8237 makes full use of a limited power budget, yet offers bandwidth and drift performance suitable for bench-top systems.

  • 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
    • See data sheet for additional features
  • Gain set with 2 external resistors
    • Can achieve low gain drift at all gains
  • 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