The AD795 is a low noise, precision, FET input operational amplifier. It offers both the low voltage noise and low offset drift of a bipolar input op amp and the very low bias current of a FET- input device. The 1014 Ω common-mode impedance insures very high power supply voltage swing and very low load current, while maintaining high gain-bandwidth product.
The AD795 is a precision FET‑input operational amplifier designed for high‑impedance, low‑noise applications such as photodiode preamps and CT scanners. It combines the low voltage noise and offset drift of a bipolar op‑amp with the ultra‑low bias current of a FET input stage, and operates over a commercial temperature range of 0 °C to +70 °C.
Key specifications include a typical input offset voltage of 500 µV, input bias current as low as 2 pA, voltage‑noise of 3.3 µV p‑p (0.1‑10 Hz), and a maximum supply current of 1.5 mA. The device is supplied in an 8‑lead SOIC package and supports a ±15 V supply range.
| Input offset voltage (max) | 500 µV |
|---|---|
| Input bias current (typ) | 2 pA |
| Input voltage noise (0.1‑10 Hz) | 3.3 µV p‑p |
| Supply current (max) | 1.5 mA |
| Supply voltage range | ±15 V |
| Operating temperature range | 0 °C to +70 °C |
| Package | 8‑Lead SOIC |
The AD795 draws up to 1.5 mA of supply current.
The typical input bias current is 2 pA, rising to 23 nA at 70 °C.
The maximum input offset voltage is 500 µV.
The AD795 is available in an 8‑lead SOIC package.