PCM1681-Q1: PSRR CURVE WITH vpp=100mV

Hi,

I do not have any curves for the PSRR for this device, but it should be noted that the PSRR is generally poor.  The device's voltage reference is generated using a pair of 15kΩ as a resistor divider.  This means that noise on the VCC supply will be only slightly attenuated.  For this reason, we recommend a large capacitor on VCOM as it will filter the noise.  So, in general, the RC function created by that cap dominates the PSRR performance.

Thanks,

Paul