Microchip tinyAVR® 0- and 1-series, and megaAVR® 0-series devices feature a successive approximation Analog-to-Digital Converter (ADC) with a maximum conversion rate of 150 ksps with 8-bit resolution, or 115 ksps with 10-bit resolution. The ADC has a flexible input multiplexer allowing single-ended ground referenced measurements of multiple internal and external input sources. Measurements can be done against a selection of internal voltage references (0.55V, 1.1V, 2.5V, and 4.3V) or directly against VDD.

Noise countermeasures supported by the ADC are: