OPAx992/OPAx92-Q1 Low Noise Op Amp Texas Instruments OPAx992/OPAx992-Q1 Low-Offset-Voltage Low Noise Operational Amplifier (Op Amp) is a family of high voltage (40V) general-purpose operational amplifiers. These devices offer excellent DC precision and AC performance, including rail-to-rail input/output, low offset (±210µV, typ.), low offset drift (±0.25µV/°C, typ.) and low noise (7nV/√Hz at 1kHz, 4.4nV/√Hz at 10kHz).