High-speed differential amplifier for precision signal chains
The THS4561IRUNR: The rail-to-rail output stage maximises dynamic range on low-voltage supplies, and the 2.85 V to 12.6 V supply span allows operation from a single 3.3 V rail up to a ±6 V split supply. The 10-WQFN (2 mm × 2 mm) package keeps the signal path compact for dense layouts.
At 315 V/µs, the THS4561IRUNR slews fast enough to preserve the edges of a 10 MHz square wave without visible rounding. That matters when the amplifier sits ahead of a high-speed SAR ADC — the input must settle to 1 LSB within the acquisition window. The 60 MHz -3 dB bandwidth supports closed-loop gains up to about 10 before the gain-bandwidth product (68 MHz) starts to limit the closed-loop response. Input bias current of 370 nA is typical for a bipolar-input differential amp; it is not a FET-input part, so source impedance above a few kilo-ohms will add offset from the bias current times the source resistance.
Supply and temperature range — deployment context
The supply span from 2.85 V to 12.6 V covers both low-voltage portable gear and traditional ±5 V analog rails. Output current of 31 mA per channel is enough to drive a 50 Ω back-terminated line or the sampling capacitor of a pipeline ADC. The 825 µA supply current is modest for a 60 MHz amplifier — the part does not need a heat sink in normal operation.
The supplier device package is 10-WQFN (2x2) — the same body as the case code.