Microchip Technology MCP4725 SOT-23-6 Evaluation Board User guide

MCP4725

SOT-23-6

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.”

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EELOQ, KEELOQ logo, microID, MPLAB, PIC, PICm i-

cro, PICSTAR T, PRO MATE, rfPIC and SmartShunt are registered trademarks of Microchip T echnology Incorporated in the U.S.A. and other countries.

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MCUs and dsPIC® DSCs, KEELOQ

code hopping

MCP4725 SOT-23-6 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.............................................................................. 5

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

1.2 What is the MCP4725 SOT-23-6 Evaluation Kit .............................................5

1.3 Getting Started with PICkit Serial Analyzer .................................................... 5

Appendix A. Schematics and Board Layouts............................................................21

A.1 Introduction ..................................................................................................21

A.2 Board - Schematic .......................................................................................22

A.3 Board - Top Layer ........................................................................................ 23

A.4 Board - Top Silk Layer .................................................................................24

A.5 Board - Bottom Layer ...................................................................................25

Appendix B. Bill Of Materials (BOM)..........................................................................27

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

MCP4725 SOT-23-6 Evaluation Board User’s Guide

NOTES:

MCP4725 SOT-23-6 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 MCP4725 SOT-23-6 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 MCP4725 SO T-23-6 Evaluation Board 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 provides an over view of the MCP4725 SOT-23-6 Evaluation Board and instructions on how to program the DAC register and EEPROM of the MCP4725 device.

• Appendix A. “Schematics and Board Layouts” – shows the schematic and layout diagrams for the MCP4725 SOT-23-6 Evaluation Board.

• Appendix B. “Bill Of Materials (BOM)” – lists the parts used to build the MCP4725 SOT-23-6 Evaluation Board.

MCP4725 SOT-23-6 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

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 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

MCP4725 SOT-23-6 Evaluation Board User’s Guide

DOCUMENT REVISION HISTORY

Revision A (October 2007)

• Initial Release of this Document.

MCP4725 SOT-23-6 EVALUATION

BOARD USER ’S GUIDE

Chapter 1. Quick Start Instructions

1.1 INTRODUCTION

The following sections provide an overview of the MCP4725 SOT-23-6 Evaluation Board and Instruction how to program the DAC register and EEPROM of the MCP4725 device using the PICkit Serial Analyzer. The following sections cover the following topics:

• What is the MCP4725 SOT-23-6 Evaluation Board?

• How to use the MCP4725 SOT-23-6 Evaluation Board with the PICkit Serial Analyzer

1.2 WHAT IS THE MCP4725 SOT-23-6 EVALUATION KIT

The MCP4725 SOT-23-6 Evaluation Board contains the MCP4725 single channel 12-Bit Digital-to-Analog Converter (DAC) and I

The purpose of this board is:

• Quick evaluation of the MCP4725 features using the PICkit Serial Analyzer: The user can program the DAC Register or EEPROM using the PICkit Serial Analyzer and measure the MCP4725 device analog output voltage using a voltmeter

• Easy handling of the MCP4725 device in a tiny SOT23-6 package: The MCP4725 device is available in a small SOT-23-6 package. This board makes it easy to handle the small package device for user’s application evaluations. The user can simply connect the J1 pins on the evaluation board to the user’s test board for a quick evaluation of the MCP4725 device. The MCP4725 supports standard mode (100 kHz), fast mode (400 kHz), and high speed mode (3.4 MHz). This evaluation board is using 5 kΩ for the I supports up to 400 kHz. The user can replace the R (less than 1 kΩ) for the high-speed mode (3.4 MHz)

C loading resistors.

C pull-up resistors. This 5 kΩ

and R3 with lower values

1.3 GETTING STARTED WITH PICKIT SERIAL ANALYZER

The user can use the MCP4725 SOT-23-6 Evaluation Board in two different ways: (a) together with the PICkit Serial Analyzer or (b) by connecting this board to the user’s target board directly.

Figure 1-1 shows the MCP4725 SOT- 23-6 Evaluation Board. The SCL, SDA, V

pins in the J1 connector are connected to the MCP47 2 5 de vice .

The MCP4725 SOT-23-6 Evaluation Kit contains two MCP4725 SOT-23-6 Evaluation Boards. This board can easily be programmed using the PICkit Serial Analyzer (DV164122). It is highly recommended that the user order the MCP4725 SOT-23-6 Evaluation Board and the PICkit Serial Analyzer at the same time.

On the MCP4725 SOT-23-6 Evaluation Board, the R resistors for the SDA and SCL, respectively . The user can replace them with their own component values of interest. It is also recommended that these pull-up resistors be removed if the user’s test board has the pull-up resistors already. The MCP4725 SOT-23-6 Eval uation Board also has footprints for additional pull-up resistors (in parallel with the R with their own components.

and R3) and loading capacitors. The user can populate the board

and R3 are the I2C pull-up load

, and

MCP4725 SOT-23-6 Evaluation Board User’s Guide

R3 (Pull-up Resistor for SCL)

MCP4725 in SOT-23-6 package

JP1: A0 selection jumper:

R1 (Pull-up Resistor for SDA)

Picture shown here is connected to the GND (A0 = 0)

Analog Output Terminal (V

OUT

)

VDD Te rminal

Ground Terminal

J1 Connector

FIGURE 1-1: MCP4725 SOT-23-6 Evaluation Board.

+ 22 hidden pages

Microchip Technology MCP4725 SOT-23-6 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 WHAT IS THE MCP4725 SOT-23-6 EVALUATION KIT

1.3 GETTING STARTED WITH PICKIT SERIAL ANALYZER