Key facts
- Brand
- STMicroelectronics
- Model
- ST7FLITE05
- Category
- Other Electronics
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-07
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STMicroelectronics AN1827 Sigma-Delta ADC Implementation Application Note
This document details the implementation of a 10-bit Sigma-Delta Analog-to-Digital Converter (ADC) using the ST7FLITE05/09 microcontroller. The solution is designed for relatively slow alternating signals (0.2 - 5Hz) in the range of 0 - 10mV peak-to-peak. The approach utilizes a simple external circuit consisting of only three RC elements alongside the microcontroller to achieve good relative accuracy and low cost.
Read onlineSTMicroelectronics ST7FLITE05 specifications
| Resolution | 10-bit |
|---|---|
| Input Range | 0 - 10mV(p-p) |
| Signal Frequency | 0.2 - 5Hz |
| Conversion Period | 51.2ms |
| Interrupt Period | 50us |
| External Components | three RC elements |
Source: STMicroelectronics AN1827 Sigma-Delta ADC Implementation Application Note
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How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the purpose of this document?
To describe how to implement a 10-bit Sigma-Delta A/D converter using a simple external circuit and a Sigma-Delta conversion program.
From: STMicroelectronics AN1827 Sigma-Delta ADC Implementation Application Note
What type of signals is this converter designed for?
It is designed for relatively slow alternating signals between 0.2 and 5Hz with a voltage range of 0 to 10mV peak-to-peak.
From: STMicroelectronics AN1827 Sigma-Delta ADC Implementation Application Note
Which microcontrollers are supported for this PIR detector design?
The design supports the ST7FLITE05(09) and Superlite microcontroller families.
From: STMicroelectronics AN1828 Application Note PIR Detector using ST7FLITE05/09/Superlite
How is sensitivity adjusted in this system?
Sensitivity can be changed by assigning high or small values to parameters in the 'select_sensitivity()' function within main.c.
From: STMicroelectronics AN1828 Application Note PIR Detector using ST7FLITE05/09/Superlite