CMRR is defined as the ratio of the power in the ADC output with an input differential sine wave, PD, to the power

of an input peak-to-peak sine wave applied to the common-mode voltage of VIN+ and VIN−, PCM, as:

CMRR dB = 10 logPD/PCM

Power Supply Rejection Ratio (PSRR)

Variations in power supply affect the full-scale transition but not the linearity of the converter. PSRR is the

maximum change in the specified full-scale transition point due to a change in power supply voltage from the

nominal value.

PSRR = 20 log cℎange in supply/cℎange in output voltage

ISOSD61

Terminology

DS13605 - Rev 8

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