The analog subsystem has the following features:
- Flexible voltage references:
- The ADCs are referenced to VREFHI and VREFLO pins.
- VREFHI pin voltage can be driven in externally or can be generated by an internal bandgap voltage reference.
- The internal voltage reference range can be
selected to be 0V to 3.3V or 0V to 2.5V.
- The buffered DAC is referenced to VREFHI and
VSSA
- The comparator DACs are referenced to VDDA and
VSSA
- Flexible pin usage
- Buffered DAC outputs, comparator subsystem inputs, PGA functions, and digital inputs (AIOs)/outputs (AGPIOs) are multiplexed with ADC inputs
- Internal connection to VREFLO on all ADCs for offset self-calibration