Analog to Digital Converter (ADC)

Abstract

This chapter covers the processing of analog data by microcontroller by using analog-to-digital converters (ADCs). The environment present around the microcontroller is analog but the processing of data in the microcontroller is done on the digital data. So, ADCs are required to convert continuous analog voltage to discrete digital number which can be realized in digital form. The microcontroller has built in ADC modules. Since the conversion of analog to digital data is done on the basis of quantization, so some error will be introduced in the conversion due to quantization. This error cannot be eliminated though it can be decreased by increasing the number of bits of digital output.