SPRACU5C June 2021 – September 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
It is recommended to connect the ADC0 analog supply VDDA_ADC0 to the recommended power supply rails in the device-specific data sheet.
Follow the notes added at the end of the Signal Descriptions, ADC, MAIN Domain table of the device-specific data sheet before using ADC0.
Refer section Peripherals, Analog-to-Digital Converter (ADC), Change Summary of AM64x / AM243x SR2.0 ADC Errata of Hardware Design Guide for AM6442, AM6422, AM6412 and AM2434 Processors application note.
ADC IOs are not fail-safe. Applying a voltage to any of the ADC inputs without powering the processor is not recommended or allowed. The ADC input applied (based on the input level) could cause residual voltage on the supply rail resulting in board start-up issues. Refer Absolute Maximum Rating table of device-specific data sheet. In case supplies that are available before the processor supply ramps are required to be monitored, it is recommended to connected these inputs to the ADC through a switch. The switch can be controlled by processor GPIO or power good signal from any of the supply source including PMIC.