JAJSN15 December 2023 ADS9227
ADVMIX
The ADS922x has three independent power supplies, AVDD_5V, AVDD_1V8, and DVDD_1V8. The AVDD_5V supply provides power to the ADC driver. The AVDD_1V8 provides power to the analog circuits. The DVDD_1V8 supply provides power to the digital interface. The AVDD_5, AVDD_1V8, and DVDD_1V8 supplies can be set independently to voltages within the permissible range. Figure 8-10 shows how to decouple the power supplies.