Measuring the DC accuracy of high performance Analog to Digital Converters
Frank Ohnhäuser
Abstract:
The standard DC parameters of an Analog to Digital converter (ADC) are linearity (integral and differential), offset and gain. To test these parameters, the voltage needs to be measured, as the output of the ADC changes from one code to the next code (transition voltage). For example, the unipolar zero of an ADC is specified as the voltage of the first code transition (code 0 to code 1) minus the respective voltage of half a LSB (least significant bit). This article compares different test solutions.
