The document introduces the features and performance of the Precision Picoampere Input Current Quad Operational Amplifier OP497 Rev. E. The features include low offset voltage, low offset voltage drift, very low bias current, very high open-loop gain, low supply current, and high common-mode rejection. It is suitable for applications such as strain gage and bridge amplifiers, high stability thermocouple amplifiers, instrumentation amplifiers, photocurrent monitors, high gain linearity amplifiers, long-term integrators/filters, sample-and-hold amplifiers, peak detectors, logarithmic amplifiers, and battery-powered systems.
The OP497 is a quad operational amplifier offering ultra‑low offset voltage, picoampere input bias current, and high open‑loop gain in a compact 16‑lead SOIC package. It is suited for strain‑gauge, thermocouple, instrumentation, and photocurrent monitoring applications.
The handbook includes detailed specifications, pin connections, typical performance graphs, application circuits, ordering information, and mechanical dimensions to aid designers in selecting and implementing the device.
| Offset Voltage (max) | 75 µV |
|---|---|
| Input Bias Current (max, 25°C) | 150 pA |
| Supply Current per Amplifier (max) | 625 µA |
| Common‑Mode Rejection | ≥114 dB |
The OP497 has a typical input bias current of 150 pA maximum at 25 °C.
Each amplifier draws up to 625 µA of supply current.