The ADS124S0x requires three power supplies: analog (AVDD, AVSS), digital core (DVDD, DGND), and digital I/O (IOVDD, DGND). The analog power supply can be bipolar (for example, AVDD = 2.5 V, AVSS = –2.5 V) or unipolar (for example, AVDD = 3.3 V, AVSS = 0 V) and is independent of the digital power supplies. DVDD is used to power the digital circuits of the devices. IOVDD sets the digital I/O levels (with the exception of the GPIO levels that are set by the analog supply of AVDD and AVSS). IOVDD must be equal to or larger than DVDD.