AD820 is a precision, low power FET input op amp that can operate from a single supply of 5.0 V to 36 V, or dual sup- plies of ±2.5 V to ±18 V. It features excellent load drive capabilities, with a minimum output current of 15 mA and capacitive load drive up to 350 pF. AD820 also has excellent AC performance and low power characteristics, with quiescent current of 800 µA, unity gain bandwidth of 1.8 MHz, and slew rate of 3.0 V/µs. AD820 is suitable for battery-powered precision instrumentation, photodiode preamps, active filters, 12- to 14-bit data acquisition systems, medical instrumentation, low power references and regulators, etc.
The AD820 is a precision, low‑power FET‑input operational amplifier designed for single‑supply operation from 5 V to 36 V (or dual supplies of ±2.5 V to ±18 V). It features rail‑to‑rail output swing, a unity‑gain bandwidth of 1.8 MHz, a slew rate of 3 V/µs, and can drive capacitive loads up to 350 pF while providing a minimum output current of 15 mA.
Typical specifications include an input offset voltage of 800 µV, input bias current as low as 25 pA, quiescent current of 800 µA, and a CMRR of up to 80 dB. The device is offered in 8‑lead plastic DIP and SOIC packages and is rated for industrial temperature range –40 °C to +85 °C.
| Supply Voltage Range (single supply) | 5 V to 36 V |
|---|---|
| Supply Voltage Range (dual supply) | ±2.5 V to ±18 V |
| Unity‑Gain Bandwidth | 1.8 MHz |
| Input Offset Voltage (max) | 800 µV |
| Input Bias Current (typical) | ≤ 25 pA |
| Capacitive Load Drive | Up to 350 pF |
| Quiescent Current (max) | 800 µA |
| Minimum Output Current | 15 mA |
The AD820 can operate from a single supply of 5 V to 36 V or from dual supplies of ±2.5 V to ±18 V.
Typical input bias current is below 25 pA.
The AD820 can drive capacitive loads up to 350 pF.
The device draws a maximum quiescent current of 800 µA.