What the 180V/µs slew rate means for signal chain design
The OPA646U is a Texas Instruments voltage feedback amplifier in an 8-SOIC package, delivering a 180V/µs slew rate that determines the maximum undistorted output voltage swing at a given frequency. For a 5 V peak-to-peak output, this slew rate supports signal frequencies up to roughly 11.5 MHz before slew-induced distortion sets in — a practical ceiling for high-speed ADC driving or video line amplification. Supply current is 5.25 mA typical, with a supply span from 9 V to 11 V minimum to maximum. Input bias current runs 2 µA and input offset voltage is 3 mV — figures that matter for DC-coupled stages where drift across temperature adds to the error budget.
Package, mounting, and temperature grade
Housed in an 8-SOIC (0.154", 3.90 mm width) package with surface-mount termination — the standard narrow-body SOIC footprint that routes to a 1.27 mm pitch. The supplier device package is listed as 8-SOIC, so the PCB land pattern follows JEDEC MS-012 variation AA. Rated for -40°C to 85°C ambient (TA), this is the industrial temperature band. A system that sees 70°C internal ambient has 15°C of margin before the upper limit; above 85°C the parametric shifts are not guaranteed.
Lifecycle and compliance status
Sourced through independent distribution channels; availability and current pricing are confirmed at RFQ against your BOM quantity. No official second-source or pin-compatible replacement is recorded from TI, so the BOM line is sole-sourced to this order code.