The ADS8363 and ADS7263 have two separate supplies: the DVDD pin for the buffers of the digital interface and the AVDD pin for all the remaining circuits.

DVDD can range from 2.3 V to 5.5 V, allowing the ADC to easily interface with processors and controllers. To limit the injection of noise energy from external digital circuitry, DVDD must be properly filtered. A bypass capacitor of 1 µF must be placed between the DVDD pin and the digital ground plane.

AVDD supplies the internal analog circuitry. For optimum performance, a linear regulator (for example, the UA7805 family) is recommended to generate the analog supply voltage in the range of 2.7 V to 5.5 V for the ADC and the necessary analog front-end.

Bypass capacitors of 1 µF must be connected to the analog ground plane such that the current is allowed to flow through the pad of these capacitors (that is, the vias must be placed on the opposite side of the connection between the capacitor and the power-supply pin of the ADC).