The AD8021 is a low noise, high speed amplifier for 16-bit systems. It features low noise, high speed, low power, low distortion, and wide supply range.
The AD8021 is a high‑performance, high‑speed voltage‑feedback amplifier designed for 16‑bit resolution systems. It offers exceptionally low voltage and current noise while operating at a very low quiescent current, making it suitable for portable instrumentation and precision signal‑processing applications.
Key features include a small‑signal bandwidth up to 560 MHz (gain = 1), slew rates up to 460 V/µs, low input offset voltage (≤1 mV), and a wide supply range from 2.25 V to 12 V. The device is available in SOIC‑8 and MSOP‑8 packages and includes an output‑disable pin for further power savings.
| Input Voltage Noise (50 kHz) | 2.1 nV/√Hz |
|---|---|
| Input Current Noise (50 kHz) | 2.1 pA/√Hz |
| Small‑Signal Bandwidth (G=+1) | 520 MHz (typ) |
| Slew Rate (G=+1) | 105 V/µs (typ) |
| Output Voltage Swing (±5 V supply) | ‑3.5 V to +3.2 V |
| Supply Voltage Range | 2.25 V to 12 V |
| Quiescent Current (output enabled) | 7 mA (typ at 5 V) |
The AD8021 has an input voltage noise of about 2.1 nV/√Hz at 50 kHz.
The device operates from a supply voltage of 2.25 V up to 12 V.
At a gain of 1, the AD8021 provides a typical slew rate of 105 V/µs.
The linear output current is specified as 60 mA, with a short‑circuit current of 75 mA.