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.
The Succes-sive approximation method is the most popular technique. It is also known as Successive ap-proximation Register (SAR) technique. This technique uses binary search method. It consists of a high speed comparator, DAC (digital to analog converter), and control logic. Refer to Figure 1. Figure 1. Successive Approximation Block Diagram
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