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.
Comparator output digital output (for steps) 1 1000 0000 2.5v 1 1000 0000 2 1100 0000 3.76v 0 1000 0000 3 1010 0000 3.13v 1 1010 0000 4 1011 0000 3.45 1 1011 0000 5 1011 1000 3.6 0 1011 0000 6 1011 0100 3.52 0 1011 0000 7 1011 0010 3.49 1 1011 0010 8 1011 0011 3.509 0 1011 0010 Final output = B2h
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