The Precision, Dual-Channel Instrumentation Amplifier AD8222 is a small-sized amplifier with low noise, high accuracy, and excellent AC performance. It is suitable for applications such as multichannel data acquisition, medical instrumentation, and industrial process control.
The AD8222 is a dual‑channel, high‑performance instrumentation amplifier that requires only one external resistor per channel to set gains from 1 to 10 000. It is offered in a compact 4 mm × 4 mm LFCSP package, enabling higher channel density while maintaining low noise and high accuracy.
Key features include low voltage noise (8 nV/√Hz at 1 kHz), high common‑mode rejection (80‑126 dB depending on gain), wide supply range (2.3 V to 18 V), and operation over an industrial temperature range (‑40 °C to +85 °C). The device can be configured for single‑channel differential output, providing excellent noise immunity for remote‑sensor applications.
| Gain range | 1 to 10 000 |
|---|---|
| Supply voltage range | 2.3 V to 18 V |
| Voltage noise (1 kHz) | 8 nV/√Hz |
| CMRR at G=1 (DC‑60 Hz) | 80 dB (min) – 86 dB (typ) |
| Quiescent current (per amplifier) | 0.9 mA – 1.1 mA |
| Input bias current (per channel) | 0.2 nA – 2.0 nA |
| Operating temperature range | ‑40 °C to +85 °C |
The AD8222 provides a gain range from 1 to 10 000 using a single external resistor per amplifier.
The device operates from a supply voltage of 2.3 V up to 18 V.
At a gain of 1, the AD8222 achieves a common‑mode rejection ratio of 80 dB minimum and 86 dB typical.
The input voltage noise is 8 nV/√Hz at 1 kHz.