40 A Micropower Instrumentation Amplifier

The AD8236 is the lowest power instrumentation amplifier in the industry. It has rail-to-rail outputs and can operate on voltages as low as 1.8 V. Its 40 μA maximum supply current makes it an excellent choice in battery-powered applications.

The AD8236’s high input impedance, low input bias current of 1 pA, high CMRR of 110 dB (G = 100), small size, and low power offer tremendous value. It has a wider common-mode voltage range than typical three-op-amp instrumentation amplifiers, making this a great solution for applications that operate on a single 1.8 V or 3 V supply. An innovative input stage allows for a wide rail-to-rail input voltage range without the crossover distortion common in other designs.

The AD8236 is available in an 8-lead MSOP and is specified over the industrial temperature range of −40°C to +125°C

Applications

* Medical instrumentation

* Low-side current sense

* Portable devices

* Low power: 40 μA supply current (maximum)

* Low input currents

* 1 pA input bias current

* 0.5 pA input offset current

* High CMRR: 110 dB CMRR, G = 100

* Space-saving MSOP

* Zero input crossover distortion

* Rail-to-rail input and output

* Gain set with single resistor

* Operates from 1.8 V to 5.5 V