13 MHz GBW in a SOT-23-5 — the audio path fit
The OPA1671IDBVT is a single-channel audio operational amplifier from Texas Instruments with a 13 MHz gain-bandwidth product and a 5 V/µs slew rate, packaged in a SOT-23-5 (SC-74A) footprint. Rated for the -40°C to +125°C industrial temperature range, it suits audio processing in automotive infotainment, outdoor broadcast equipment, and engine-bay communication modules where the ambient temperature swings beyond commercial limits. The rail-to-rail output stage lets the signal swing to within millivolts of the supply rails — useful in single-supply 3.3 V or 5 V audio codec interfaces where headroom is tight.
Supply current and input bias — what they mean for the BOM line
Drawing 940 µA supply current per channel, this op-amp keeps the power budget low in multi-channel mixers or active crossover networks where eight or more devices share a single 5 V rail. The 10 pA typical input bias current is low enough that a 10 kΩ source impedance contributes only 0.1 µV of offset error — negligible for line-level audio paths but worth noting if the front-end uses a high-impedance volume control or electret microphone capsule. Maximum input offset voltage is 250 µV; for a 2 Vrms audio signal this represents 0.0125% DC error, well below audible thresholds, but it does set the DC-blocking capacitor requirement in the signal chain.