Transcription of Understanding and minimising ADC conversion errors
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Understanding and minimising ADC conversion errors
AN1636/06031/42AN1636 APPLICATION NOTEUNDERSTANDING AND minimising ADC CONVERSIONERRORSBy Microcontroller Division Applications1 INTRODUCTIONThe purpose of this document is to explain the different ADC errors and the techniques thatapplication developers can use to minimise them. The ADC (Analog to Digital Converter) is animportant peripheral that connects the analog world to the digital world of this application note the ADC embedded in the ST7 microcontroller is used as an example,however the same principles to apply to other accuracy of analog to digital conversion has an impact on overall system quality and effi-ciency.
UNDERSTANDING AND MINIMISING ADC CONVERSION ERRORS VAREF is the reference voltage used by ADC for conversions. The details are mentioned in Section 2.5 After this comparison is done, the next significant bit is set (=VAREF/4) and a comparison is done again with the input voltage. The procedure is followed till all the bit positions are com-pared.
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