SIMPLIS has two built-in analog-to-digital converters and one digital-to-analog converter. Both ADC models quantize the analog input into a digital word on the specified clock edge direction. The Analog-to-Digital Converter w/ Adjustable Voltage Reference has a reference input pin which allows the reference voltage to change during the simulation; however, the analog-to-digital converter has a fixed-reference voltage.
Individual documentation is provided for these model types: