Texas Instruments OPA4191IRUMR, CMOS quad operational amplifier, 2.5 MHz gain bandwidth, 7.5 V/µs slew rate, 5 µV input offset, rail-to-rail output, 140 µA per channel supply, 4.5 V to 36 V supply, -40°C to 125°C, 16-WQFN Exposed Pad.
| Parameter | Value |
|---|---|
| Output type | Rail-to-Rail |
| Mounting | Surface Mount |
| Amplifier type | CMOS |
| Voltage - input offset | 5 µV |
| Voltage - supply span | 4.5 V |
| Current - supply | 140µA (x4 Channels) |
| Current - input bias | 5 pA |
| Current - output (Channel) | 65 mA |
| Operating temperature | -40°C ~ 125°C |
| Gain bandwidth product | 2.5 MHz |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Slew rate | 7.5V/µs |
| Case | 16-WQFN Exposed Pad |
| Number of circuits | 4 |
That combination — precision without the usual power penalty — is what makes it the right choice for multi-channel sensor conditioning, data-acquisition front ends, and battery-powered instrumentation where every microamp counts. With a gain-bandwidth product of 2.5 MHz and a 7.5 V/µs slew rate, it handles audio-band signals and low-speed multiplexed ADC drivers cleanly.
Yes, the output type is rail-to-rail, allowing the output to swing to the supply rails for maximum dynamic range in single-supply systems.
The OPA4191 is the lower-power, lower-offset choice for precision applications.