AD622 is a low-cost instrumentation amplifier with features such as easy to use, higher performance, and wide power supply range. It provides unity gain or optional gain with one external resistor, suitable for applications such as transducer interface, low-cost thermocouple amplifier, and industrial process.
The AD622 is a monolithic instrumentation amplifier from Analog Devices, offering low cost, high performance, and gain programmable with a single external resistor. It features unity‑gain operation, laser‑trimmed internal resistors, and excellent linearity and common‑mode rejection.
It supports supply voltages from +2.6 V to +15 V, provides up to 1000 kHz bandwidth at gain 1, a 1.2 V/µs slew rate, 125 µV maximum input offset, 5 nA maximum input bias current, and 66 dB minimum CMRR, making it suitable for thermocouple amplification, data acquisition, and difference‑amplifier applications.
| Gain Range | 2 to 1000 |
|---|---|
| Gain Error (G=1) | 0.15 % |
| Input Offset Voltage | 125 µV max |
| Input Bias Current | 5 nA max |
| CMRR (G=1) | 66 dB min |
| Bandwidth (G=1) | 1000 kHz |
| Supply Voltage Range | +2.6 V to +15 V |
| Operating Temperature Range | -40 °C to +85 °C |
The AD622 provides a gain range from 2 to 1000.
It operates from +2.6 V up to +15 V.
The maximum input offset voltage is 125 µV.
At gain of 1 the -3 dB bandwidth is 1000 kHz.