SBAS482C January 2010 – September 2017 ADS7924
The device has two separate power supplies: AVDD and DVDD. The device operates on AVDD; DVDD is used for the interface circuits. DVDD supply voltage cannot exceed the AVDD supply voltage. The Power supply pins of the device must be decoupled with 1-μF ceramic bypass capacitors. The AVDD supply also defines the full-scale input range of the device. Always set the AVDD supply to be greater than or equal to the maximum input signal to avoid saturation of codes.