User manual

MCP3901 ADC EVALUATION BOARD
FOR 16-BIT MCUs USER’S GUIDE
 2010 Microchip Technology Inc. DS51845B-page 3
Table of Contents
Preface ........................................................................................................................... 5
Introduction............................................................................................................ 5
Document Layout .................................................................................................. 5
Conventions Used in this Guide ............................................................................ 6
Recommended Reading........................................................................................ 7
The Microchip Web Site ........................................................................................ 7
Customer Support ................................................................................................. 7
Document Revision History ................................................................................... 7
Chapter 1. Hardware Description
1.1 Overview ........................................................................................................ 9
1.2 PIM Module/MCP3901 Connection and Peripheral Usage Overview .......... 11
1.3 MCP3901 Delta-Sigma Sampling/MCLK Options ........................................ 12
1.4 Analog Input Structure .................................................................................. 13
1.5 Universal Serial Bus (USB) .......................................................................... 13
Chapter 2. Firmware
2.1 DSPIC33 Firmware Description ................................................................... 15
2.2 Data Acquisition ........................................................................................... 16
2.3 UART Communication Protocol ................................................................... 18
Chapter 3. MCP3901 PC Software Tool
3.1 Software Overview ....................................................................................... 21
3.2 Setting the Configuration of the ADC ........................................................... 22
3.3 Connectivity and Recording Length ............................................................. 22
3.4 Scope Plot Window - Time Domain Analysis ............................................... 22
3.5 Histogram Window – Noise Analysis ............................................................ 22
3.6 FFT Window – Frequency Domain Analysis ................................................ 23