The document describes the features and characteristics of the AD620 Rev. G low-cost, low-power instrumentation amplifier. The amplifier features easy-to-use gain setting, wide power supply range, higher performance than 3 op amp IA designs, low power consumption, excellent DC and AC performance, and low noise. It is suitable for applications such as weigh scales, ECG and medical instrumentation, transducer interface, data acquisition systems, industrial process controls, and battery-powered and portable equipment.
The AD620 instrumentation amplifier from Analog Devices provides high accuracy with a single external resistor for gain selection from 1 to 10 000. It is offered in 8‑lead PDIP, CERDIP and SOIC packages and draws only 1.3 mA max supply current, making it suitable for battery‑powered and portable applications such as medical ECG monitors.
Key features include a wide power‑supply range (+2.3 V to +18 V), low input offset voltage (50 pV max), low input bias current (1.0 nA max), 120 kHz bandwidth at gain 100, and 100 dB minimum common‑mode rejection ratio at gain 10.
| Gain range | 1 to 10,000 |
|---|---|
| Maximum supply current | 1.3 mA |
| Input offset voltage | 50 pV max |
| Input bias current | 1.0 nA max |
| Bandwidth (G=100) | 120 kHz |
| Common‑mode rejection ratio (G=10) | 100 dB min |
| Power‑supply range | +2.3 V to +18 V |
The AD620 can be set to a gain from 1 up to 10 000 using a single external resistor.
The device draws a maximum of 1.3 mA supply current.
The AD620 has an input offset voltage of up to 50 pV.
The AD620 is offered in 8‑lead PDIP, CERDIP and SOIC packages.