This document describes the features of the low cost low power instrumentation amplifier AD620 by Analog Devices. The product is characterized by easy to use, wide power supply range, higher performance, low power consumption, etc. It is suitable for applications such as weigh scales, ECG and medical instrumentation, transducer interface, data acquisition systems, industrial process controls, battery-powered and portable equipment.
The AD620 is a low‑cost, high‑accuracy instrumentation amplifier that requires only one external resistor to set gains from 1 to 10 000. It is offered in 8‑lead PDIP, CERDIP and SOIC packages, making it suitable for battery‑powered, portable and remote applications such as weigh scales, ECG, transducer interfaces and data‑acquisition systems.
Key specifications include a wide supply voltage range of +2.3 V to +18 V, a maximum supply current of 1.3 mA, low input offset voltage (50 µV max), low input bias current (1 nA max), 100 dB minimum CMRR (G=10), 120 kHz bandwidth (G=100) and a 15 µs settling time to 0.01 %.
| Gain range | 1 to 10,000 |
|---|---|
| Supply voltage range | +2.3 V to +18 V |
| Supply current (max) | 1.3 mA |
| Input offset voltage (max) | 50 µV |
| Input bias current (max) | 1.0 nA |
| Common‑mode rejection ratio (min) | 100 dB (G = 10) |
| Bandwidth (G = 100) | 120 kHz |
| Settling time to 0.01 % | 15 µs |
| Voltage noise (1 kHz) | 9 nV/√Hz |
The AD620 provides a gain range from 1 to 10 000 using a single external resistor.
It operates from a supply voltage of +2.3 V up to +18 V.
The device draws up to 1.3 mA maximum supply current.
The AD620 is offered in 8‑lead PDIP, CERDIP and SOIC packages.