As shown in Figure 274, the DVDD power supply (1.15 V) must be stable before ramping up the AVDD19 supply (1.9 V). The AVDD supply (1.15 V) can come up in any order during the power sequence. The power supplies can ramp up at any rate and there is no hard requirement for the time delay between DVDD (1.15 V) ramping up to AVDD (1.9 V) ramping up (which can be in orders of microseconds but is recommended to be a few milliseconds).

Figure 274. Power Sequencing for the ADC31RF80 Family of Devices