JAJSPW8E march 2011 – february 2023 ADS4222 , ADS4225 , ADS4226 , ADS4242 , ADS4245 , ADS4246
PRODUCTION DATA
For best performance, the AVDD supply should be driven by a low noise linear regulator (LDO) and separated from the DRVDD supply. It is possible to have AVDD and DRVDD share a single supply, but they should be isolated by a ferrite bead and bypass capacitors in a PI-filter configuration, at a minimum. The digital noise will be concentrated at the sampling frequency and harmonics of the sampling frequency and could contain noise related to the sampled signal. While developing schematics, it is a good idea to leave extra placeholders for additional supply filtering.