What this quad op-amp is and where it fits
The Texas Instruments OPA4347UA is a quad-channel, general-purpose operational amplifier from the microPOWER™ series, packing four rail-to-rail output amplifiers into a 14-SOIC package. It draws just 20 µA total supply current across all four channels, making it a fit for battery-operated instrumentation, multi-channel sensor conditioning, and portable medical devices where every microamp counts. The 350 kHz gain-bandwidth product and 0.17 V/µs slew rate place it firmly in the slow-signal domain — think thermocouple amplifiers, strain-gauge bridges, or photodiode front-ends, not audio or high-speed ADC drivers.
Input bias and offset — the sensor interface specs
With 0.5 pA typical input bias current and 2 mV input offset voltage, the OPA4347UA can interface directly with high-impedance sources like pH probes or photodiodes without adding significant error.
Package and footprint — what hits the pick-and-place
The 14-SOIC (0.154", 3.90 mm width) is a standard, widely supported footprint. The part ships in Tube — if your line runs tape-and-reel only, factor in a transfer step or confirm tube-compatible feeders.
Lifecycle and sourcing reality
The OPA4347UA is listed as Active and ROHS3 compliant. No NRND or EOL notice is on record, so it remains a safe choice for new designs and production BOMs.