The OP191/OP291/OP491 series are single-supply, rail-to-rail input/output op amps with wide supply voltage ranges and low power consumption.
The OP191, part of the OPx91 family, is a single‑supply micropower operational amplifier offering rail‑to‑rail input and output swings. It operates from 2.7 V to 12 V and is specified for an industrial temperature range of –40 °C to +125 °C. The device is available in an 8‑lead SOIC package.
The datasheet provides detailed electrical specifications, absolute maximum ratings, thermal resistance data, and typical performance curves. Application examples include low‑power instrumentation, power‑supply control, and sensor interfaces such as thermocouple amplifiers and notch filters.
| Supply Voltage Range | 2.7 V to 12 V |
|---|---|
| Input Offset Voltage (typical) | 500 µV |
| Input Bias Current (typical) | 65 nA |
| Power Supply Rejection Ratio (typical) | 110 dB |
| Slew Rate | 0.4 V/µs |
| Gain Bandwidth Product | 3 MHz |
The OP191 operates from 2.7 V up to 12 V.
The typical slew rate is 0.4 V/µs.
Typical input offset voltage is 500 µV.
The gain‑bandwidth product is 3 MHz.