The purpose of this document is to explain the different ADC errors and the techniques that application developers can use to minimise them. The ADC (Analog to Digital Converter) is an important peripheral that connects the analog world to the digital world of microcontrollers.
This document explains different Analog-to-Digital Converter (ADC) errors and the techniques application developers can use to minimize them. It uses the ADC embedded in the ST7 microcontroller as an example, though the principles apply to other ADCs. The text emphasizes that ADC accuracy depends on overall system design, including PCB layout, voltage sources, and analog source impedance.
The note covers ADC block descriptions, terminology, and various sources of error such as power supply noise, analog input signal noise, and source resistance effects. It details different types of A/D converter errors including offset, gain, and linearity errors. Additionally, it provides PCB layout recommendations and explains how power saving modes affect the ADC.
| Document Part Number | AN1636 |
|---|---|
| Target Microcontroller Family | ST7 |
The purpose is to explain different ADC errors and the techniques that application developers can use to minimize them.
No, the ADC itself cannot ensure the accuracy of results; it depends on the overall system design.
Factors include PCB layout, voltage source, I/O switching, and analog source impedance.