The AD622 is a low cost, moderately accurate instrumentation amplifier that requires only one external resistor to set any gain between 2 and 1,000. Or for a gain of unity gain, no external resistor is required.
The document describes the AD622, a low-cost, moderately accurate instrumentation amplifier designed to replace discrete two or three op-amp designs. It requires only one external resistor to set any gain between 2 and 1000, or no external resistor for unity gain. The device incorporates precision laser-trimmed resistors to provide superior linearity and common-mode rejection.
| Gain Range | 2 to 1000 (unity gain with no external resistor) |
|---|---|
| Supply Voltage Range | +2.6 V to +15 V |
| Max Input Offset Voltage | 125 µV |
| Input Bias Current | 5 nA max |
| Common-Mode Rejection Ratio (G=1) | 66 dB min |
| Bandwidth (G=10) | 800 kHz |
| Slew Rate | 1.2 V/µs |
| Operating Temperature Range | -40°C to +85 °C |
No, it requires no external resistor for a gain of 1.
The quiescent current ranges from 0.9 mA to 1.3 mA, up to a maximum of 1.5 mA over temperature.
The device is available in 8-Lead PDIP and SOIC packages.