The AD620 is a low-cost, low-power instrumentation amplifier featuring easy to use, wide power supply range, high performance, low power consumption, excellent DC performance, low noise, good AC characteristics, etc.
The AD620 is a low‑cost, high‑accuracy instrumentation amplifier that requires only one external resistor to set gains of 1 to 10 000. It is offered in 8‑lead PDIP, CERDIP and SOIC packages, drawing only 1.3 mA max supply current, making it suitable for battery‑powered and portable applications such as weigh scales, ECG, transducer interfaces and data‑acquisition systems.
The device provides a wide supply voltage range of +2.3 V to +18 V, low input offset voltage (50 µV max), low input bias current (1.0 nA max), 100 dB minimum CMRR (G = 10) and a bandwidth of 120 kHz at G = 100. Detailed specifications, absolute maximum ratings, typical performance curves and ordering information are included in the datasheet.
| Gain range | 1 to 10 000 |
|---|---|
| Supply voltage range | +2.3 V to +18 V |
| Quiescent supply current | 1.3 mA max |
| Input offset voltage | 50 µV max |
| Input bias current | 1.0 nA max |
| Common‑mode rejection ratio (CMRR) | 100 dB min (G = 10) |
| Input voltage noise | 9 nV/√Hz @ 1 kHz |
| Bandwidth | 120 kHz (G = 100) |
| Operating temperature range | ‑40 °C to +85 °C (‑55 °C to +125 °C for S‑grade) |
The AD620 provides a gain range from 1 to 10 000.
It operates from a supply voltage of +2.3 V up to +18 V.
The input offset voltage is specified as 50 µV maximum.
The input bias current is limited to 1.0 nA maximum.