AD8021 is a low noise, high speed amplifier for 16-bit systems. It features low noise, high speed, low power, and low distortion, making it suitable for applications such as ADC preamps and drivers, instrumentation preamps, active filters, portable instrumentation, line receivers, precision instruments, ultrasound signal processing, and high gain circuits.
The AD8021 is a high‑performance, high‑speed voltage‑feedback amplifier designed for 16‑bit resolution systems. It offers very low input voltage and current noise, a wide supply range (2.25 V to 12 V), and an output‑disable feature that reduces quiescent current.
The device is available in SOIC‑8 and MSOP‑8 packages, operates from –40 °C to +85 °C, and includes detailed specifications for bandwidth, slew rate, distortion, and power dissipation.
| Slew Rate (G=+1) | 105 V/µs (typ) |
|---|---|
| Input Voltage Noise | 2.1 nV/√Hz (50 kHz) |
| Input Offset Voltage | 1.0 mV (max) |
| Supply Voltage Range | +2.25 V to +12 V |
| Quiescent Current (output enabled) | 7 mA typical at 5 V |
| Output Voltage Swing (±5 V supply) | ‑3.5 V to +3.2 V |
| Linear Output Current | 70 mA |
The typical input voltage noise is 2.1 nV/√Hz measured at 50 kHz.
It operates from a minimum of 2.25 V up to 12 V.
Typical quiescent current is about 7 mA at a 5 V supply.