OPA856 Wideband Low-Noise Op Amp Texas Instruments OPA856 Wideband Low-Noise Operational Amplifier (Op Amp) comes with bipolar inputs for wideband transimpedance and voltage amplifier applications. The ultra-wide, 1.1GHz gain-bandwidth product (GBWP) of the OPA856, combined with the broadband voltage noise of 0.9nV/√Hz, produces a viable amplifier for wideband transimpedance applications, high-speed data acquisition systems. It also works with applications with weak signal inputs that require low-noise and high-gain front ends. The OPA856 combines multiple features to optimize dynamic performance. In addition to the wide small-signal bandwidth, the OPA856 has 110MHz of large-signal bandwidth (VOUT = 2VPP) and a slew rate of 350V/µs.