An ADC is used to convert an analogue signal such as voltage to a digital form so that it can be read and processed by a microcontroller. Some microcontrollers have built-in ADC converters.

Why do we use ADC?

A common use for an ADC is to convert analog video to a digital format. ... This is why all sound cards that have an analog audio input also require an ADC that converts the incoming audio signal to a digital format. The accuracy of the audio conversion depends on the sampling rate used in the conversion process.

How does ADC work in microcontroller?

An Analog to Digital Converter (ADC) is a very useful feature that converts an analog voltage on a pin to a digital number. ... The microcontroller monitors the number of clock cycles that pass before the capacitor is discharged. This number of cycles is the number that is returned once the ADC is complete.