Evaluating Zero-Drift Amplifier Performance
Zero-drift amplifiers, which achieve microvolt-level accuracy and excellent low frequency noise, are the ideal choice for these high-sensitivity measurement systems. Many zero-drift opamps available on the market feature great specifications but the offset cancelation circuits used in their designs introduce signal artifacts that may significantly degrade performance. In many practical applications, especially those involving ADCs or even moderate levels of source impedance, these amplifiers will not achieve the accuracy suggested by their datasheets.
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