The analog subsystem module is described in this section.
The analog modules on this device include the
Analog-to-Digital Converter (ADC), temperature sensor, Comparator Subsystem (CMPSS),
Programmable Gain Amplifier (PGA), and buffered Digital-to-Analog Converter
(DAC).
The analog subsystem has the following features:
- Flexible voltage references
- The ADCs are referenced
to VREFHIx and VSSA pins
- VREFHIx 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 0 V to 3.3 V or 0
V to 2.5 V
- The buffered DACs are referenced to VREFHIx and
VSSA
- The comparator DACs are referenced to VDDA and
VSSA
- Flexible pin usage
- Buffered DAC outputs,
comparator subsystem inputs, and digital inputs (AIOs)/outputs (AGPIOs)
are multiplexed with ADC inputs
- Internal connection to
VREFLO on all ADCs for offset self-calibration