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19 Analog Applications JournalTexas instruments IncorporatedAmplifiers: Op Amps2Q and Mixed-Signal ProductsAuto- zero amplifiers ease the design ofhigh-precision circuitsA wide variety of electronic applications deal with the conditioning of small input signals. These systems requiresignal paths with very low offset voltage and low offsetvoltage drift over time and temperature. With standard linear components, the only way to achieve this is to usesystem-level auto -calibration. However, adding auto -calibration requires more complicated hardware and soft-ware and can slow down time to market for new alternative is to use components with low offset andlow drift. The amplifiers with by far the lowest offset anddrift available are the Auto-zero amplifiers (AZAs). Theseamplifiers achieve high dc precision through a continuouslyrunning calibration mechanism that is implemented a typical input offset of 1 V, a temperature-relateddrift of 20 nV/ C, and a long-term drift of 20 nV/month,these amplifiers satisfy even the highest requirements ofdc s AZAs differ neither in form nor in the applicationfrom standard operational amplifiers .
Texas Instruments Incorporated Amplifiers: Op Amps
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