Analog-to-digital converter

An analog-to-digital converter (abbreviated ADC, A/D or A to D) is an electronic integrated circuit that converts a continuous quantity to a discrete time digital number. An ADC may also provide an isolated measurement. The reverse operation is performed by a digital-to-analog converter (DAC).

Typically, an ADC is an electronic device that converts an input analog voltage or current to a digital number. The size of the number grows with an increase in the input voltage or current.  However, some non-electronic or only partially electronic devices, such as rotary encoders, can also be considered ADCs.

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More websites

 Counting Type ADC  A simple tutorial showing how to build your first ADC.
 An Introduction to Delta Sigma Converters A very nice overview of Delta-Sigma converter theory.
 Digital Dynamic Analysis of A/D Conversion Systems through Evaluation Software based on FFT/DFT Analysis RF Expo East, 1987
 Which ADC Architecture Is Right for Your Application?  article by Walt Kester
 AN71 - The Care and Feeding of High Performance ADCs Real world circuit and layout advice
 ADC and DAC Glossary  Defines commonly used technical terms.
 Signal processing and system aspects of time-interleaved ADCs. 
 Introduction to ADC in AVR - Analog to digital conversion with Atmel microcontrollers

Category:Electronic circuits