STMicroelectronics AN1903 Application Note First Order Sigma Delta Converter Using ST52x440

The ST52x440 is a member of ST52 microcontroller family and can be used to implement Sigma-Delta (Σ∆) converters.

Brand: STMicroelectronics
Category: Other Electronics
Document type: Application Note
Language: English
Pages: 8
File format: PDF
File size: 124 KB
Published: 07 August, 2012
Updated: 30 September, 2023
MD5 checksum: E6DDE974E919BB5F2A54BB18CA13E360
PDF: STMicroelectronics AN1903 Application Note First Order Sigma Delta Converter Using ST52x440 PDF

About this manual

The document details how to implement a Sigma-Delta (SD) analog-to-digital converter in firmware on an ST52x440 microcontroller. It explains that while many devices in this family have built-in A/D converters, this specific implementation uses the internal Analog Comparator as a single-slope ADC.

What's inside

Introduction
Sigma-Delta Theory
Implementation with ST52x440 Microcontroller
Firmware Description
Peripheral Configuration and Micro Initialization
Result Computation and Loop Closing
Result Shown

Specifications

Baud Rate	9600 bits/s
Sampling Frequency Interrupt Period	15.6 ms

Frequently asked questions

What microcontroller is used for this implementation?

The application note uses a member of the ST52 microcontroller family, specifically the ST52x440.

How is the integration function performed?

The external capacitor Cint performs the role of the integrator in this specific hardware setup.

What is the input voltage range for conversion?

The system allows for the conversion of signals in the range divided by 5V (0 to 5V).

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