What this high-speed voltage-feedback amp brings to the board
The THS4031IDGN: Its 100 MHz -3 dB bandwidth and 100 V/µs slew rate make it a natural fit for video distribution, ADC input drivers, and high-speed data acquisition front ends where settling time and large-signal response matter. The amplifier operates from a 9 V to 32 V supply span. Supply current is 8.5 mA per channel. Input offset voltage is 500 µV max and input bias current is 3 µA. Output current capability is 90 mA.
8-HVSSOP package — thermal pad matters
The THS4031IDGN comes in an 8-HVSSOP package (the exposed-pad variant of the standard MSOP-8). That exposed pad on the underside is the primary heat path — in a high-speed design where the amplifier is swinging large signals at high frequency, the die can dissipate several hundred milliwatts. The pad needs a soldered thermal land on the PCB with vias to a ground plane to keep junction temperature under control. Without that, the part will thermally limit well before the 90 mA output current rating is reached. The package is surface mount, so it is a reflow-only part — not a field-swap candidate without a hot-air station.
It is not qualified to AEC-Q100, so it is not a first choice for under-hood automotive, but fine for infotainment or body electronics that use industrial-grade parts.
For a production BOM, this means no forced redesign window.
