An analog-to-digital converter (abbreviated ADC, A/D or A to D) is a device which converts continuous signals to discrete digital numbers. 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 dig
ital number. 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.Analog to digital converter is device that mostly used on data acquisition system. Computer using discrete data, meanwhile physic quantity is analog data. Physic quantity converted to electricity unit (voltage or current) through the sensor/transducer. So that Microcontroller to be able to read analog signal from sensor, then need one analog to digital converter that change analog signal become digital signal.
Conversion process can do with a several method. Several parameters that will determine quality an analog to digital converter, that is:
- Quantization error
- Un-linearity
- Missing code (lost)
- Conversion time
References:
- http://en.wikipedia.org
- Translated to english, WolfGankLink, Pengukuran, Pengaturan, dan Pengontrolan dengan PC
