AD8065/AD8066 is a high performance, 145 MHz FastFET operational amplifier from Analog Devices. This device features low power, high speed, low noise, wide voltage range, single supply and rail-to-rail output, and is widely used in instrumentation, photodiode preamps, filters, A/D drivers, level shifting, buffering and other applications.
The AD8065 (single) and AD8066 (dual) FastFET™ amplifiers are voltage‑feedback op‑amps with FET inputs, offering a 145 MHz –3 dB bandwidth, 180 V/µs slew rate, and very low noise (7 nV/√Hz, 0.6 fA/√Hz). They operate from a wide supply range of 5 V to 24 V, support single‑supply and rail‑to‑rail output, and draw only about 6.4 mA per amplifier.
These devices are suited for instrumentation, photodiode pre‑amps, video buffers, A/D driver circuits, level shifting, and other high‑speed, low‑noise applications. The datasheet provides detailed specifications, absolute maximum ratings, typical performance curves, connection diagrams, and layout recommendations.
| Bandwidth (–3 dB, G=+1, AD8065) | 145 MHz |
|---|---|
| Slew Rate (G=+2, AD8065) | 180 V/µs |
| Input Voltage Noise (10 kHz) | 7 nV/√Hz |
| Input Current Noise (10 kHz) | 0.6 fA/√Hz |
| Supply Voltage Range | 5 V to 24 V |
| Quiescent Current per Amplifier | 6.4 mA |
| Output Short‑Circuit Current | 90 mA |
| Power Supply Rejection Ratio | ‑85 dB to ‑100 dB |
The AD8065 has a –3 dB bandwidth of 145 MHz at a gain of +1.
Both devices achieve a slew rate of 180 V/µs when configured for a 4 V step.
They operate from 5 V up to 24 V, suitable for single‑supply designs.
The input voltage noise is 7 nV/√Hz measured at 10 kHz.