AD797 is a low noise, low distortion operational amplifier from Analog Devices
The AD797 is an ultra‑low‑noise, ultra‑low‑distortion operational amplifier designed for precision pre‑amplifier applications such as audio, ultrasound, and imaging systems. The datasheet lists key features including 0.9 nV/√Hz input voltage noise, –120 dB THD, 110 MHz gain‑bandwidth product, and 50 mA output drive.
Detailed sections cover absolute maximum ratings, electrical specifications, typical performance graphs, noise analysis, recommended power‑supply bypassing, and example circuit configurations for non‑inverting, inverting, and differential line‑receiver applications.
| Input Voltage Noise (1 kHz) | 0.9 nV/√Hz typ |
|---|---|
| Total Harmonic Distortion (20 kHz) | -120 dB |
| Gain‑Bandwidth Product (G=1000) | 110 MHz |
| Output Drive Current | 50 mA |
The AD797 has a typical input voltage noise of 0.9 nV/√Hz at 1 kHz.
The absolute maximum supply voltage rating is ±18 V.
For a closed‑loop gain of 1000, the AD797 provides a gain‑bandwidth product of 110 MHz.
The device can source or sink up to 50 mA of output current.