AD8222 is a dual-channel instrumentation amplifier from Analog Devices with low noise and high accuracy DC performance. It is suitable for multichannel data acquisition, process control, Wheatstone bridge sensors, differential drives for high resolution ADCs, remote sensors, etc.
The AD8222 is a dual‑channel, high‑performance instrumentation amplifier that requires only one external resistor per amplifier to set gains from 1 to 10,000. It is offered in a compact 4 mm × 4 mm LFCSP package, enabling high channel density while maintaining low noise and high accuracy.
The document includes detailed specifications such as supply voltage range, gain range, CMRR, bandwidth, and quiescent current, as well as pin descriptions, functional block diagrams, typical performance graphs, and application notes for medical instrumentation, industrial process control, and differential sensor interfaces.
| Supply Voltage Range | +2.3 V to +18 V |
|---|---|
| Gain Range | 1 to 10,000 |
| CMRR (typical) | 126 dB at G = 100 |
| Input Bias Current (typical) | 0.2 nA per channel |
| Bandwidth (‑3 dB) | 1200 kHz at G = 1 |
| Quiescent Current (typical) | 0.9 mA per amplifier |
| Operating Temperature Range | -40 °C to +85 °C |
The AD8222 operates from +2.3 V up to +18 V.
Gains from 1 to 10,000 can be selected using a single external resistor per amplifier.
The AD8222 provides a minimum CMRR of 126 dB at a gain of 100.
Each amplifier draws about 0.9 mA of quiescent current under typical conditions.