The AD620 instrumentation amplifier from Analog Devices offers a gain that can be set with a single external resistor, ranging from 1 to 10 000. It operates from a wide power‑supply range of ±2.3 V to ±18 V and consumes only up to 1.3 mA, making it suitable for battery‑powered and portable applications.
Key features include a low input offset voltage of 50 µV max, input bias current as low as 0.5 nA, high common‑mode rejection (up to 100 dB), and a bandwidth of 120 kHz at a gain of 100. The device is offered in 8‑lead DIP and SOIC packages and is rated for operation from –40 °C to +85 °C.
| Gain range | 1 to 10,000 |
|---|---|
| Supply voltage range | ±2.3 V to ±18 V |
| Quiescent current | 1.3 mA max |
| Input offset voltage | 50 µV max |
| Common‑mode rejection ratio (CMRR) | 100 dB (G = 10) |
| Bandwidth | 120 kHz (G = 100) |
| Input voltage noise | 9 nV/√Hz at 1 kHz |
| Package options | 8‑lead DIP and SOIC |
The AD620 can be configured for a gain from 1 up to 10 000 using a single external resistor.
The device draws a maximum of 1.3 mA supply current.
It is available in 8‑lead PDIP (plastic) and 8‑lead SOIC packages.
The input offset voltage is specified as 50 µV maximum.