AD8235 Instrumentation Amplifier

AD8235 Instrumentation Amplifier

ADI's AD8235 is one of the industry's smallest and lowest power instrumentation amplifiers. The AD8235 measures 1.5 mm x 2.2 mm with a wafer level chip scale package (WLCSP) and draws a maximum quiescent current of 40 µA. Additionally, it draws only 6 nA (typical) of current during shutdown mode. The AD8235's miniscule size, combined with its ultra-low power consumption, makes it an excellent instrumentation amplifier for battery-powered and portable medical devices and consumer-health products.

The AD8235 can operate on supply voltages as low as 1.8 V. The input stage allows for wide rail-to-rail input voltage range without the crossover distortion common in other designs. The rail-to-rail output enables easy interfacing to ADCs.

Features
  • Ultra-low power
    • 40 µA supply current (max.)
    • 6 nA shutdown current
  • Low input bias current: 50 pA
  • High common mode rejection ratio: 110 dB
  • Zero input crossover distortion
  • Highly versatile
    • Rail-to-rail input / output
    • Shutdown pin
    • Resistor gain setting (G=5 to 200)
  • Space-saving WLCSP package
  • AD8236: same device in MSOP package w/o shutdown
Applications
  • Medical instrumentation
  • Low-side current sense
  • Portable electronics

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