The AD622 is a low cost, moderately accurate instrumentation amplifier that requires only one external resistor to set any gain between 2 to 1000, and is suitable for a wide range of applications such as transducer interfaces, low cost thermocouple amplifiers, industrial process controls, differential amplifiers and low cost data acquisition.
The AD622 is a low‑cost, monolithic instrumentation amplifier offering high accuracy and flexibility with a single external resistor for gain programming. It delivers unity‑gain operation, low power consumption (1.5 mA max), and a wide supply voltage range.
Typical applications include thermocouple amplification, transducer interfaces, industrial process controls, and data acquisition. The device provides excellent DC performance, low noise, high common‑mode rejection, and a bandwidth up to 1 MHz at gain = 1.
| Gain Range | 1‑1000 |
|---|---|
| Gain Error (G=1) | 0.05‑0.15 % |
| Input Bias Current | 2‑5 nA |
| Bandwidth (G=1) | 1000 kHz |
| Slew Rate | 1.2 V/µs |
| Supply Voltage Range | +2.6 V to +15 V |
| CMRR (G=1) | 66 dB |
The AD622 provides a gain range from 1 to 1000.
It operates from +2.6 V up to +15 V.
At a gain of 1, the bandwidth is 1000 kHz.