AD8057/AD8058 are low cost, high performance 325 MHz voltage feedback amplifiers
The AD8057 (single) and AD8058 (dual) are voltage‑feedback amplifiers offering high speed (325 MHz –3 dB bandwidth for the AD8058) and low noise (7 nV/√Hz). They provide low power consumption, a wide supply range from 3 V to 12 V, and gain flatness of 0.1 dB to 28 MHz, making them suitable for imaging, DVD/CD, photodiode pre‑amps, A‑to‑D drivers, and professional cameras.
Both devices are offered in compact packages: AD8057 in SOIC‑8 and SOT‑23‑5, AD8058 in SOIC‑8 and MSOP. They operate over an industrial temperature range of –40 °C to +85 °C and include ESD protection. The datasheet provides detailed electrical specifications, absolute maximum ratings, ordering information, and typical performance curves.
| -3 dB Bandwidth (AD8058, G=+1, 0.2 Vpp) | 325 MHz |
|---|---|
| Slew Rate | 1000 V/µs |
| Input Voltage Noise | 7 nV/√Hz |
| Quiescent Current (AD8058) | 15 mA (typical) |
| Power Supply Range | 3 V to 12 V |
| Gain Flatness | 0.1 dB to 28 MHz |
| Total Harmonic Distortion (5 MHz, 2 Vpp, 1 kΩ load) | -85 dBc |
The devices operate from 3 V up to 12 V.
AD8057 is offered in SOIC‑8 and SOT‑23‑5 packages; AD8058 is offered in SOIC‑8 and MSOP packages.
Typical quiescent current is about 15 mA at a 5 V supply.
The input voltage noise is 7 nV/√Hz at 100 kHz.