This application note discusses voltage referencesfor use with Crystal Semiconductor’s successiveapproximation series of A/D converters. Referencedesign considerations, a design example andsuggested reference circuits are explained in detail.Voltage references provide accurate voltages foruse in data acquisition systems in order to establisha basis for conversion. In a data acquisitionsystem, the value of the reference sets the gain ofthe A/D stage since the digital output correspondsto the ratio of the analog input signal to the referencevoltage.
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