An analog to digital (A/D) converter cannot ensure ideal accuracy by itself. A number of parameters can affect the achievable accuracy of an A/D converter in an application. For example: • A/D conversion timing (that is, acquisition time, conversion time, sampling time, sampling jitter, and so on) • Power supply characteristics (noise, internal impedance) • Isolation between digital and analog portions of the data acquisition system • Internal and external impedance matching • I/O switching • PCB layout
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