Answer: ADC stands for Analog-to-Digital converter (also abbreviated A/D or A to D). It is an electronic device that converts an input analog voltage (or current) to a digital number proportional to the magnitude of the voltage or current. However, some non-electronic or only partially electronic devices, such as rotary encoders, can also be considered ADCs. The digital output may use different coding schemes, such as binary, Gray code or two's complement binary.
Next Question: What is Admittance?
Previous Question: What is AC Voltage?