What this op amp is and where it fits
The Texas Instruments OPA379AIDBVT is a single-channel, general-purpose CMOS operational amplifier in a SOT-23-5 package. It draws just 2.9 µA of supply current while delivering a 90 kHz gain-bandwidth product and a 0.03 V/µs slew rate — numbers that tell you this is a micropower part designed for battery-operated and always-on sensing circuits, not for high-speed signal chains. The rail-to-rail output stage lets it swing close to the supply rails, which matters when you are running from a 1.8 V rail and need every millivolt of headroom. Temperature range covers -40°C to 125°C, so it can sit on an outdoor sensor board or inside an engine-bay module without a grade change.
Supply range and rail-to-rail output
The OPA379AIDBVT operates from 1.8 V to 5.5 V single supply. That 1.8 V floor matches a single Li-ion cell or a 1.8 V digital rail, so you can run it directly off the same supply as a low-voltage microcontroller or sensor. The rail-to-rail output stage means the output can swing within a few millivolts of the rails — useful when the ADC reference is also 1.8 V and you cannot afford a volt of lost swing. Output current is rated at 5 mA per channel, enough to drive a typical ADC input or a logic gate, but not a relay coil or a headphone.
Lifecycle and sourcing
The OPA379AIDBVT is listed as Active and ROHS3 compliant. No end-of-life notice or last-time-buy window is on record. For dual-sourcing or a higher-speed alternative, the TLV9351IDCKR (3.5 MHz, 20 V/µs, 600 µA supply) is a functional second source in the same SOT-23-5 footprint, though at a much higher supply current. Sourced and quoted to order through independent distribution; availability and current pricing confirmed at quote time.