Microchip Technology MCP3911 Manuel utilisateur

2012 Microchip Technology Inc. DS52033A

MCP3911

ADC Evaluation Board

for 16-Bit MCUs

User’s Guide

DS52033A-page 2 2012 Microchip Technology Inc.

Information contained in this publication regarding device

applications and the like is provided only for your convenience

and may be superseded by updates. It is your responsibility to

ensure that your application meets with your specifications.

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suits, or expenses resulting from such use. No licenses are

conveyed, implicitly or otherwise, under any Microchip

intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, dsPIC,

KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,

PIC32 logo, rfPIC and UNI/O are registered trademarks of

Microchip Technology Incorporated in the U.S.A. and other

countries.

FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,

MXDEV, MXLAB, SEEVAL and The Embedded Control

Solutions Company are registered trademarks of Microchip

Technology Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, chipKIT,

chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net,

dsPICworks, dsSPEAK, ECAN, ECONOMONITOR,

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Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB,

MPLINK, mTouch, Omniscient Code Generation, PICC,

PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE,

rfLAB, Select Mode, Total Endurance, TSHARC,

UniWinDriver, WiperLock and ZENA are trademarks of

Microchip Technology Incorporated in the U.S.A. and other

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in the U.S.A.

All other trademarks mentioned herein are property of their

respective companies.

Printed on recycled paper.

ISBN: 978-1-62076-120-5

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the

intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our

knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data

Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not

mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our

products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts

allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

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and India. The Company’s quality system processes and procedures

are for its PIC®MCUs and dsPIC®DSCs, KEELOQ®code hopping

devices, Serial EEPROMs, microperipherals, nonvolatile memory and

analog products. In addition, Microchip’s quality system for the design

and manufacture of development systems is ISO 9001:2000 certified.

QUALITY MANAGEMENT S

YSTEM

CERTIFIED BY DNV

== ISO/TS 16949 ==

MCP3911 ADC EVALUATION BOARD

FOR 16-BIT MCUs USER’S GUIDE

2012 Microchip Technology Inc. DS52033A-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/MCP3911 Connection and Peripheral Usage Overview .......... 11

1.3 Analog Input Structure .................................................................................. 13

1.4 Universal Serial Bus (USB) .......................................................................... 13

Chapter 2. Evaluation Board PC Software

2.1 Overview ...................................................................................................... 15

Appendix A. Schematics and Layouts

A.1 Introduction .................................................................................................. 17

A.2 Schematic - ADC and Power ....................................................................... 18

A.3 Schematic - Microcontroller (MCU) ............................................................. 19

A.4 Schematic - PIM Module .............................................................................. 20

A.5 Schematic - LCD and UART ........................................................................ 21

A.6 Board - Top Trace and Top Silk ................................................................... 22

A.7 Board - bottom Trace and bottom Silk ......................................................... 22

A.8 Board - LAYER #2 GND .............................................................................. 23

A.9 Board - LAYER #3 VDD ............................................................................... 23

A.10 Board - Top SILK and PADS ..................................................................... 24

A.11 Board - Bottom SILK and PADS ................................................................ 24

Appendix B. Bill of Materials (BOM)........................................................................... 25

Worldwide Sales and Service .................................................................................... 28

MCP3911 ADC Evaluation Board for 16-Bit MCUs User’s Guide

DS52033A-page 4 2012 Microchip Technology Inc.

NOTES:

MCP3911 ADC EVALUATION BOARD

FOR 16-BIT MCUs USER’S GUIDE

2012 Microchip Technology Inc. DS52033A-page 5

Preface

INTRODUCTION

This chapter contains general information that will be useful to know before using the

MCP3911 ADC Evaluation Board for 16-Bit MCUs. Items discussed in this chapter

include:

• Document Layout

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the MCP3911 ADC Evaluation Board for 16-Bit

MCUs as a development tool to emulate and debug firmware on a target board. The

manual layout is as follows:

•Chapter 1. “Hardware Description” – Provides important information about the

MCP3911 ADC Evaluation Board for 16-Bit MCUs hardware.

•Chapter 2. “Firmware” – Describes the MCP3911 ADC Evaluation Board for

16-Bit MCUs firmware.

•Chapter 2. “Evaluation Board PC Software” – Provides information about the

evaluation board software.

•Appendix A. “Schematics and Layouts”– Shows the schematic and board

layouts for the MCP3911 ADC Evaluation Board for 16-Bit MCUs.

•Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the

MCP3911 ADC Evaluation Board for 16-Bit MCUs.

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and

documentation are constantly evolving to meet customer needs, so some actual dialogs

and/or tool descriptions may differ from those in this document. Please refer to our web site

(www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each

page, in front of the page number. The numbering convention for the DS number is

“DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the

document.

For the most up-to-date information on development tools, see the MPLAB®IDE online help.

Select the Help menu, and then Topics to open a list of available online help files.

MCP3911 ADC Evaluation Board for 16-Bit MCUs User’s Guide

DS52033A-page 6 2012 Microchip Technology Inc.

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB®IDE User’s Guide

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog

A menu selection select Enable Programmer

Quotes A field name in a window or

dialog

“Save project before build”

Underlined, italic text with

right angle bracket

A menu path File>Save

Bold characters A dialog button Click OK

A tab Click the Power tab

N‘Rnnnn A number in verilog format,

where N is the total number of

digits, R is the radix and n is a

digit.

4‘b0010, 2‘hF1

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New Sample source code #define START

Filenames autoexec.bat

File paths c:\mcc18\h

Keywords _asm, _endasm, static

Command-line options -Opa+, -Opa-

Bit values 0, 1

Constants 0xFF, ‘A’

Italic Courier New A variable argument file.o, where file can be

any valid filename

Square brackets [ ] Optional arguments mcc18 [options] file

[options]

Curly brackets and pipe

character: { | }

Choice of mutually exclusive

arguments; an OR selection

errorlevel {0|1}

Ellipses... Replaces repeated text var_name [, var_name...]

Represents code supplied by

user

void main (void)

{ ...

}

Preface

2012 Microchip Technology Inc. DS52033A-page 7

RECOMMENDED READING

This user's guide describes how to use MCP3911 ADC Evaluation Board for 16-Bit

MCUs. Another useful document is listed below. The following Microchip document is

available and recommended as a supplemental reference resource:

•MCP3911 Data Sheet - “3.3V Two Channel Analog Front End” (DS22286)

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at www.microchip.com. This web

site is used as a means to make files and information easily available to customers.

Accessible by using your favorite Internet browser, the web site contains the following

information:

•Product Support – Data sheets and errata, application notes and sample

programs, design resources, user’s guides and hardware support documents,

latest software releases and archived software

•General Technical Support – Frequently Asked Questions (FAQs), technical

support requests, online discussion groups, Microchip consultant program

member listing

•Business of Microchip – Product selector and ordering guides, latest Microchip

press releases, listing of seminars and events, listings of Microchip sales offices,

distributors and factory representatives

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

Customers should contact their distributor, representative or field application engineer

(FAE) for support. Local sales offices are also available to help customers. A listing of

sales offices and locations is included in the back of this document.

Technical support is available through the web site at: http://support.microchip.com.

DOCUMENT REVISION HISTORY

Revision A (March 2012)

• Initial release of this document.

MCP3911 ADC Evaluation Board for 16-Bit MCUs User’s Guide

DS52033A-page 8 2012 Microchip Technology Inc.

NOTES:

MCP3911 ADC EVALUATION BOARD

FOR 16-BIT MCUs USER’S GUIDE

2012 Microchip Technology Inc. DS52033A-page 9

Chapter 1. Hardware Description

1.1 OVERVIEW

The MCP3911 ADC Evaluation Board for 16-Bit MCUs system provides the opportunity

to evaluate the performance of the MCP3911 dual-channel ADC. It also provides a

development platform for 16-bit PIC®-based applications, using existing 100-pin PIC

microcontroller Plug-in Module (PIM) systems that are compatible with the Explorer 16

and other high pin count PIC®-based demo boards. The system comes with a

programmed PIC24FJ256GA110 PIM module that communicates with the Energy

Management Utility software for data exchange and ADC setup.

1.1.1 Feature Highlights

• Dual ADC MCP3911 output display using serial communication to the PC

software interface

• Simultaneous 55 ksps at OSR32 address loop ALL or 95 dB SINAD at OSR512

performance on MCP3911

• System and ADC performance analysis through graphical PC tools showing noise

histogram, frequency domain (FFT), time domain scope plot, and statistical

numerical analysis

• Robust hardware design with analog grounding and analog/digital separation,

allowing low noise evaluation of MCP3911 devices; includes separate power

supplies and power planes on a 4-layer board.

• PICtail™ Plus connectors for Explorer 16 daughter board compatibility

MCP3911 ADC Evaluation Board for 16-Bit MCUs User’s Guide

DS52033A-page 10 2012 Microchip Technology Inc.

FIGURE 1-1: MCP3911 Evaluation Board.

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