The ADC2y signal chain includes a bias voltage generator of typically 0.78 V followed by a common-mode buffer, VCMy. When the VCMy_EN bit is set, the output of the VCMy buffer is internally connected to the V7y multiplexer channel to provide the bias voltage to V7y. Use the VCMy buffer to implement pseudo-differential measurements, where V7y is selected as the negative multiplexer channel of ADC2y.

When the VCMy buffer is enabled, the capacitive load from V7y to AGNDy must be limited to less than 100 pF.