View source for Analog-to-digital converter

[[File:WM WM8775SEDS-AB.jpg|thumb|right|250px|4-channel stereo multiplexed analog-to-digital converter WM8775SEDS made by [[Wolfson Microelectronics]] placed on a [[Sound Blaster X-Fi|X-Fi Fatal1ty Pro]] [[sound card]].]]

An '''analog-to-digital converter''' (abbreviated '''ADC''', '''A/D''' or '''A to D''') is an [[electronics|electronic]] [[integrated circuit]] that converts a [[Continuous signal|continuous quantity]] to a [[Discrete signal|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 [[electronics|electronic]] device that converts an input analog [[voltage]] or [[Electric current|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 encoder]]s, can also be considered ADCs.

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==More websites==
{{wikibooks|Analog and Digital Conversion}}
* [http://ikalogic.com/tut_adc.php Counting Type ADC] {{Webarchive|url=https://web.archive.org/web/20120326054435/http://www.ikalogic.com/tut_adc.php |date=2012-03-26 }} A simple tutorial showing how to build your first ADC.
* [http://www.beis.de/Elektronik/DeltaSigma/DeltaSigma.html An Introduction to Delta Sigma Converters] A very nice overview of Delta-Sigma converter theory.
* [http://www.ieee.li/pdf/adc_evaluation_rf_expo_east_1987.pdf Digital Dynamic Analysis of A/D Conversion Systems through Evaluation Software based on FFT/DFT Analysis] RF Expo East, 1987
* [http://www.analog.com/library/analogDialogue/archives/39-06/architecture.html Which ADC Architecture Is Right for Your Application?] {{Webarchive|url=https://web.archive.org/web/20130210192445/http://www.analog.com/library/analogDialogue/archives/39-06/architecture.html |date=2013-02-10 }} article by Walt Kester
* [http://www.linear.com/docs/4160 AN71 - The Care and Feeding of High Performance ADCs] Real world circuit and layout advice
* [http://www.maxim-ic.com/appnotes.cfm/an_pk/641/CMP/ELK-11 ADC and DAC Glossary] {{Webarchive|url=https://web.archive.org/web/20091124061906/http://www.maxim-ic.com/appnotes.cfm/an_pk/641/CMP/ELK-11 |date=2009-11-24 }} Defines commonly used technical terms.
* [http://www2.spsc.tugraz.at/people/cvogel/TIADC.html Signal processing and system aspects of time-interleaved ADCs.] {{Webarchive|url=https://web.archive.org/web/20110821083219/http://www2.spsc.tugraz.at/people/cvogel/TIADC.html |date=2011-08-21 }}
* [http://www.robotplatform.com/knowledge/ADC/adc_tutorial.html Introduction to ADC in AVR] - Analog to digital conversion with Atmel microcontrollers


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[[Category:Electronic circuits]]