The AD745 is an ultralow noise, high-speed, FET input operational amplifier. It offers both the ultralow voltage noise and high speed generally associated with bipolar input op amps and the very low input currents of FET input devices. Its 20 MHz bandwidth and 12.5 V/µs slew rate makes the AD745 an ideal choice for applications with a source resistance of ±1000 ohms.
The AD745 combines the low voltage noise of bipolar op‑amps with the low input current of FET devices. It offers 2.9 nV/√Hz noise at 10 kHz, 0.38 µV p‑p low‑frequency noise, and a 0.5 mV maximum offset voltage, making it suitable for precision low‑noise applications.
Typical applications include sonar, photodiode amplifiers, accelerometers, hydrophones, and high‑performance audio. The device is supplied in a 16‑lead SOIC package (AD745J/K) and is available in tape‑and‑reel form.
| Maximum Input Offset Voltage | 0.5 mV |
|---|---|
| Maximum Input Bias Current | 250 pA |
| Gain Bandwidth Product | 20 MHz |
| Slew Rate | 12.5 V/µs |
The AD745 has a maximum input offset voltage of 0.5 mV.
The input bias current is specified as a maximum of 250 pA.
The AD745 provides a gain‑bandwidth product of 20 MHz.
The device has a slew rate of 12.5 V/µs.