Microchip Technology MCP3425 SOT23-6 Evaluation Board User guide

MCP3425 SOT23-6

Evaluation Board

User’s Guide

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.

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in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates.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. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.

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EELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,

PICSTART, rfPIC, SmartShunt and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

FilterLab, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL, SmartSensor 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, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM, PICDEM.net, PICtail, PIC

logo, PowerCal, PowerInfo, PowerMate, PowerT ool, REAL ICE, rfLAB, Select Mode, Total Endurance, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

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All other trademarks mentioned herein are property of their respective companies.

Printed on recycled paper.

Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and T empe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC devices, Serial EEPROMs, microperipherals, nonvolatile memo ry and analog products. In addition, Microchip’s quality system for the desig n and manufacture of development systems is ISO 9001:2000 certified.

MCUs and dsPIC® DSCs, KEELOQ

code hopping

MCP3425 SOT23-6 EVALUATION

BOARD USER’S GUIDE

Table of Contents

Preface ...........................................................................................................................1

Introduction............................................................................................................1

Document Layout..................................................................................................1

Conventions Used in this Guide............................................................................2

Recommended Reading........................................................................................3

The Microchip Web Site........................................................................................ 3

Customer Support.................................................................................................3

Document Revision History...................................................................................4

Chapter 1. Quick Start Instructions

1.1 Introduction .....................................................................................................5

1.2 Description of the MCP3425 SOT23-6 Evaluation Board ..............................5

1.3 Getting Started with PICkit™ Serial Analyzer ................................................7

Appendix A. Schematic and Layouts

A.1 Introduction ..................................................................................................23

A.2 Board – Schematic .......................................................................................24

A.3 Board – Top Layer ....................................................................................... 25

A.4 Board – Top Metal Layer .............................................................................26

A.5 Board – Bottom Layer .................................................................................27

Appendix B. Bill Of Materials (BOM)

Worldwide Sales and Service ....................................................................................30

MCP3425 SOT23-6 Evaluation Board User’s Guide

NOTES:

MCP3425 SOT23-6 EVALUATION

BOARD USER’S GUIDE

Preface

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

IDE on-line help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the MCP3425 SOT23-6 Evaluation Board. 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 MC P34 25 SOT 2 3- 6 Eva lua tio n Boa rd as a development tool to emulate and debug firmware o n a target board. The manual la yout is as follows:

• Chapter 1. “Quick Start Instructions” – this chapter provide s an overview of the MCP3425 SOT23-6 Evaluation Board and instructions on how to program the DAC register and EEPROM of the MCP4725 device.

• Appendix A. “Schematic and Layouts” – shows the schematic and layout diagrams for the MCP3425 SOT23-6 Evaluatio n Boar d.

• Appendix B. “Bill Of Materials (BOM)” – lists the parts used to build the MCP3425 SOT23-6 Evaluation Board.

MCP3425 SOT23-6 Evaluation Board User’s Guide

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

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

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

Courier New font:

Plain Courier New Sample source code #define START

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

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

Ellipses... Replaces repeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the total number of digits, R is the radix and n is a digit.

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

Choice of mutually exclusive arguments; an OR selection

Represents code supplied by user

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options] errorlevel {0|1}

var_name...] void main (void)

{ ... }

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

Preface

C Interface and

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. Lo cal 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

MCP3425 SOT23-6 Evaluation Board User’s Guide

DOCUMENT REVISION HISTORY

Revision A (January 2009)

• Initial Release of this Document.

MCP3425 SOT23-6 EVALUATION

BOARD USER’S GUIDE

Chapter 1. Quick Start Instructions

1.1 INTRODUCTION

The following sections provide an overview of the MCP3425 SOT23-6 Evaluation Board and demonstrate how to use it with the PICkit™ Serial Analyzer (P/N: DV164122).

The following topics are covered:

• Description of the MCP3425 SOT23-6 Evaluation Board

• Using MCP3425 SOT23-6 Evaluation Board with the PICkit Serial Analyzer to evaluate the MCP3425 device.

1.2 DESCRIPTION OF THE MCP3425 SOT23-6 EVALUATION BOARD

The MCP3425 SOT23-6 Evaluation Board (P/N MCP3425EV) contains a MCP3425 16-bit Delta-Sigma Analog-to-Digital Converter (ADC). The MCP3425 is an 16-bit single channel ADC device with various options. The MCP3425 SOT23-6 Evaluation Board has analog input connection p ads and V can connect any sensor input signal to this evaluation board and test the ADC conversion results. The PICkit Serial Analyzer’s PC graphic user interface (GUI) provides the user’s interface for configuration register bits of the MCP3425 and displays the ADC conversion values. The PICkit Serial Analyzer links between the GUI and the MCP3425 SOT23-6 Evaluation Board and provides the I the MCP3425 SOT23-6 Evaluation Board. The user also can use this MCP3425 SOT23-6 Evaluation Board without the PICkit Serial Analyzer by providing the I communication signal to the SDA and SCL test pads on the board.

This evaluation board has the following interfaces:

• PICkit Serial Analyzer (P/N: DV164122) for writing configuration register bits and reading the conversion data.

, SDA, and SCL test pads. The user

C communication to

Note: The user can use this board without the PICkit Serial Analyzer as long as

the V does not include MCU.

The user can monitor the I SDA and SCL test pads. Refer to Appendix A. “Schematic and Layouts”.

, SCL, and SDA are provided to the board. This evaluation board

communications by connecting an oscilloscope to the

MCP3425 SOT23-6 Evaluation Board User’s Guide

1.2.1 I2C Address Bits

The I2C device code and address bits of the MCP3425 device in this evaluation board are pre-programmed at factory (Code: 1101000).

FIGURE 1-1: Front and Back Views of the MCP3425 SOT23-6 Evaluation Board.

Quick Start Instructions

1.3 GETTING STARTED WITH PICKIT™ SERIAL ANALYZER

Figure 1-1 shows the MCP3425 SOT23-6 Evaluation Board, while Figure 1-2 shows the evaluation board and the PICkit Serial Analyzer co nn ec tio n.

The following instructions show how to use them together:

1. Connect the MCP3425 SOT23-6 Evaluation Board’s J1 pin socket to the PICkit

Serial Analyzer, as shown in Figure 1-2.

2. Connect oscilloscope probes to SCL and SDA test pins (optional).

3. V

selection: You can use the VDD from the PICkit Serial Analyzer or your own

external V (a) Connect JP1, if using V (b) Disconnect JP1 and apply V

. You can select the VDD path using the JP1 connector:

from PICkit Serial Analyzer.

at the VDD pad, if you are using external VDD.

Note: If you are using external V

4. Connect V

, if external VDD is used.

, connect the external VDD at VDD pad.

Note: Do not connect VDD if you are using the VDD from the PICkit Serial

Analyzer. The PICkit Serial Analyzer provides the V

automatically if it is

connected to the PC.

5. LED D1 is turned on when V

is applied.

Note: If the VDD is provided from the PICkit Serial Analyzer , then the LED may no t

be turned on until you execute a command. See Section 1.3.2.1 “Creating a Script File for Configuration Byte Writing” for executing the I

command.

6. Connecting analog inputs: If you need to measure single-ended input, connect the unused pin (for example, V

7. Use the PICkit Serial Analyzer PC GUI to send I

-) to VSS.

C write and read commands.

See Section 1.3.2.1 “Creating a Script File for Configuration Byte Writing”

8. Execute the PICkit Serial Analyzer Script file and obtain the ADC conversion results. The conversion results app ear on the PICkit Serial Analyzer PC GUI. You can also observe the conversion results using the oscilloscope.

CAUTION

The analog input pin has ESD diodes. Certain input conditions can damage the device. Please pay attention to the following conditions:

(a) Do not apply input greater than the input rang e sp ec ifie d by th e MCP3425 data sheet.

(b) Apply input signal after the V

is powered-up.

+ 23 hidden pages

Microchip Technology MCP3425 SOT23-6 Evaluation Board User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

INTRODUCTION

DOCUMENT LAYOUT

CONVENTIONS USED IN THIS GUIDE

RECOMMENDED READING

THE MICROCHIP WEB SITE

CUSTOMER SUPPORT

DOCUMENT REVISION HISTORY

Chapter 1. Quick Start Instructions

1.1 INTRODUCTION

1.2 DESCRIPTION OF THE MCP3425 SOT23-6 EVALUATION BOARD

1.3 GETTING STARTED WITH PICKIT™ SERIAL ANALYZER