Audio differential driver — what it does and where it fits
The Texas Instruments OPA1637DGKT is a single-channel audio differential op amp in an 8-VSSOP package. It delivers a 9.2 MHz gain-bandwidth product with a 15 V/µs slew rate, enough to handle full audio bandwidth with margin for anti-aliasing filtering ahead of a sigma-delta ADC. The differential output eliminates the need for a separate balun or transformer when driving the differential input of a codec or audio ADC — a common topology in professional audio gear, active speakers, and automotive infotainment head units.
Supply range and output drive
Supply span runs from 3 V to 36 V. Each output channel can source or sink 31 mA.
DC precision and temperature range
Input offset voltage is 20 µV typical. Input bias current is 200 pA.
Package and sourcing note
The 8-VSSOP footprint is 3.00 mm wide, a common land pattern for audio signal-chain designs. The part is available in Tape & Reel or Cut Tape for prototype and production volumes. Lifecycle status is Active, so no near-term last-time-buy risk for new designs.