43.1 Overview

The Analog-to-Digital Convertor can convert one independent signal using the SAR (Successive Approximation Register) ADC Module. The ADC module supports up to 12 bit resolution. For sample timing and conversion rates, see the 51.19 Analog-to-Digital Converter (ADC) Electrical Specifications. Single-ended and differential measurements are supported. Signed and unsigned sampling formats are supported.

The SAR ADC module can support up to 14 separate analog input channels.

ADC measurements can be started by either application software or an incoming event from another peripheral in the device. ADC measurements can be started with predictable timing, and without software intervention.

Both internal AVDD and external VREFH reference voltages can be used (i.e., AVDD or VREFH respectively).

The ADC has a digital result compare function for accurate monitoring of user-defined thresholds, with minimum software intervention required. Hardware oversampling is also supported in the ADC’s hardware.