Microchip Technology MCP3423 User Manual

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Page 1

MCP3423

Evaluation Board

User’s Guide

Page 2

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in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates.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.

Trademarks

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

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, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

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

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MCP3423 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 ................................................................................... 3

Chapter 1. Quick Start Instructions

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

1.2 Description of the MCP3423 Evaluation Board .............................................. 5

1.3 Getting Started with PICkit Serial Analyzer .................................................... 6

1.4 Experiment for CH2 ...................................................................................... 22

Appendix A. Schematic and Layouts

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

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

A.3 Board – Top Laer ......................................................................................... 25

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

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

A.6 Board – Bottom Metal Layer ........................................................................ 28

Appendix B. Bill of Materials (BOM)

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

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MCP3423 Evaluation Board User’s Guide

NOTES:

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MCP3423 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 MCP3423 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 MCP3423 Evaluation Board as a development tool to emulate and debug firmware on a target board. The manual layout is as follows:

• Chapter 1. “Quick Start Instructions” – this chapter provides an overview of the

MCP3423 Evaluation Board and instructions on how to use the MCP3423 Evaluation Board with the PICkit Serial Analyzer.

• Appendix A. “Schematic and Layouts” – shows the schematic and layout

diagrams for the MCP3423 Evaluation Board.

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

MCP3423 Evaluation Board.

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MCP3423 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)

{ ... }

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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

C Interface and On-Board Reference” (DS22088)

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 (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 (November 2008)

• Initial Release of this Document.

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MCP3423 Evaluation Board User’s Guide

NOTES:

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MCP3423 EVALUATION BOARD

USER ’S GUIDE

Chapter 1. Quick Start Instructions

1.1 INTRODUCTION

The following sections provide an overview of the MCP3423 Evaluation Board and demonstrate how to use it with the PICkit™ Serial Analyzer (P/N: DV164122).

The following topics are covered:

• Description of the MCP3423 Evaluation Board

• How to use MCP3423 Evaluation Board with the PICkit Serial Analyzer

1.2 DESCRIPTION OF THE MCP3423 EVALUATION BOARD

The MCP3423 Evaluation Board (P/N MCP3423EV) contains a MCP3423 18-Bit ΔΣ Analog-to-Digital Converter (ADC). The MCP3423 is a 2-channel 18 bit delta-sigma ADC device with various configuration options. The board has analog input connection pads and various test pads.

The user can connect inputs and test the conversion results using the PICkit Serial Analyzer and its PC graphic user interface (GUI). The MCP3423 Evaluation Board has the following interfaces:

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

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

the V Board does not include MCU.

The board has test points for SDL, SDA, and analog inputs. By connecting an oscilloscope to these test points, the user can examine the data communications through the I

Appendix A. “Schematic and Layouts”.

, SCL, and SDA are provided through J1 connector. This Evaluation

2C™

bus line and observe the resulting conversion output. Refer to

1.2.1 I2C Address Bits and A0 Address Bit Selection

The I2C device code and address bits of the MCP3423 device are:

• Device Code: ‘1101’

• A2, A1, A0 Address Bits: determined by the JP2 (Adr1 pin) and JP3 (Adr0 pin).

• See Table 1-1 for the I

C Device Address bits and JP2 and JP3 connections.

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MCP3423 Evaluation Board User’s Guide

FIGURE 1-1: Front View of the MCP3423 Evaluation Board.

1.3 GETTING STARTED WITH PICKIT SERIAL ANALYZER

Figure 1-1 shows the MCP3423 Evaluation Board, and Figure 1-2 shows the MCP3423 and PICkit Serial Analyzer.

The following describes how to use them together:

1. Connect the MCP3423 Evaluation Board’s 6-pin socket to the PICkit Serial Analyzer as shown in Figure 1-2.

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

3. V

4. Address bit selection using JP2 and JP3 connectors.

The I

• MCP3423 I

• A2, A1, A0 Address Bits: determined by the JP2 (Adr1 pin) and JP3 (Adr0 pin)

• The JP2 and JP3 connectors are external address bit selections. Connect these

• See Table 1-1 for the I

5. Connecting V

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

own external V

(a) Connect JP1, if using V

(b) Disconnect JP1 and apply V

C device code and address bits of the MCP3423 device are:

C device code: ‘1101’

pins to V

, VDD, float, or connect any arbitrary voltage

Analyzer will provide V

. The JP1 connector selects the VDD path.

from PICkit Serial Analyzer.

at VDD1 pin, if you are using an external VDD.

C Device Address bits and JP2 and JP3 connections

: LED D1 turns on when V

automatically, if it is connected to the PC. Make sure

is applied. The PICkit Serial

LED D1 turns on, when you execute the command using the PICkit Serial Analyzer.

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Quick Start Instructions

6. Connecting the analog inputs: If you need to measure a single-ended input,

connect the unused pin (example, CHx-) to V

• Connecting the inputs: The MCP3423 Evaluation Board has input pads for two

analog input channels. You can connect all inputs at the same time and multiplex the input channel using configuration register settings. You can also leave the unused channel inputs floating.

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

CAUTION

Each analog input pin has an ESD diode. Certain input conditions can damage the device. Please use the following conditions:

(a) Do not apply an input greater than the input range specified by the MCP3423 Data

Sheet.

(b)Apply the input signal after V

TABLE 1-1: I

C ADDRESS BITS VS. JP2 AND JP3 CONNECTORS

is powered-up.

C write and read commands.

I2C Device Address

Bits

110 1 000 W

/R Connected to V

110 1 001 W/R Connected to V 110 1 010 W

/R Connected to V 110 1 100 W/R Connected to V 110 1 101 W/R Connected to V 110 1 110 W

/R Connected to V 110 1 011 W/R Float Connected to V 110 1 111 W/R Float Connected to V

JP2 (Adr1 Pin) JP3 (Adr0 Pin)

Connected to V

Float

Connected to V

Float

Connected to V

110 1 000 W/R Float Float Note 1: W

/R bit = “0” for writing, “1” for reading.

2: Float: (a) Leave pin without connecting to anything, or (b) apply Addr_Float voltage.

See MCP3423 Data Sheet for more details.

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MCP3423 Evaluation Board User’s Guide

PICkit Serial Analyzer

MCP3423 Evaluation Board

USB Cable

Personal

Computer

Connected between the

PICkit Serial Analyzer

and Personal Computer

Sensor Input Connectors

FIGURE 1-2: MCP3423 Evaluation Board with the PICkit Serial Analyzer.

1.3.1 PICkit Serial Analyzer PC Software Setup for the MCP3423 Evaluation Board

The following steps describe how to set up and use the PICkit Serial Analyzer PC Graphic User Interface (GUI).

1. Install the PICkit Serial Analyzer software onto your personal computer (PC).

2. Connect the USB cable between the PICkit Serial Analyzer and the PC.

3. Run the PICkit Serial PC Software - it will open to the following GUI:

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Quick Start Instructions

FIGURE 1-3: PICkit Serial Analyzer Configuration Window welcome window.

Click the Next button and follow the instructions.

4. Select the Communication Mode type: I2C Master, and click the Next button.

FIGURE 1-4: Step 1 - Communication Mode selection.

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MCP3423 Evaluation Board User’s Guide

5. In the new window, select “100 kHz” or “400 kHz”. Either one will be fine. Click

the Next button.

FIGURE 1-5: Step 2 - I

Note: The MCP3423 device supports the I

current version of the PICkit Serial Analyzer supports the I up to 400 kHz only.

C Communication Speed window.

C bus data rate up to 3.4 MHz, but the

C bus data rate

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Quick Start Instructions

6. In the Device Pullups window, select No on “Enable Pull-ups” and click the Next

button.

Note: The MCP3423 Evaluation Board has its own pull-up resistors.

FIGURE 1-6: Step 3 - Device Pullups window.

7. In this step, you have to select the V

Board, then click the Next button.

voltage of the MCP3423 Evaluation

Case 1: When you use VDD from the PICkit Serial Analyzer:

If you choose PICkit Serial will power your d evice and 5 Volts as shown in

Figure 1-7, the MCP3423 Evaluation Board is powered by the 5V DC from the PICkit Serial Analyzer through the JP1 jumper. In this case, make sure that the JP1 jumper on the MCP3423 Evaluation Board is connected.

Case 2: When you use your own VDD:

You can also provide your own VDD voltage by applying a VDD voltage at VD1 test point. In this case, make sure that the JP1 jumper is disconnected.

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MCP3423 Evaluation Board User’s Guide

FIGURE 1-7: Step 4 - Voltage Source selection window.

8. Click the OK button. You have made all of the PICkit Serial Analyzer

Configuration Setups. You are now ready to program the MCP3423 Evaluation Board using the PICkit Serial Analyzer.

FIGURE 1-8: Configuration Wizard - Finishing step.

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Quick Start Instructions

1.3.2 Creating Script Files

In order to make a communication connection between the PICkit Serial Analyzer and the MCP3423 Evaluation Board, a script file is needed. Figure 1-9 shows how to create script files and how to use them.

• In the PICkit Serial Analyzer window, select from the menu Communication

Script>Script Builder .

FIGURE 1-9: Creating a script file with Script Builder.

1.3.2.1 CREATING SCRIPT FILE FOR CONFIGURATION BYTE WRITING

1. Click on WriteBlockAddrA8 in “Example I This will result in filling in the spaces under the “Script Detail” column.

You can now modify the “Script Detail” column parameters by right-clicking the mouse.

How to modify the parameters box in Script Details:

1. Under the “Script Detail” box, select the item in the parameter box.

2. Right click the mouse button and an option box appears to the right of your selection. These are the options available for the parameter selected.

3. Select the desired option and delete or insert the parameter box.

4. Keep the parameters in order as shown in Figure 1-10:

C Scripts” column.

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MCP3423 Evaluation Board User’s Guide

1. To change value:

• Click this box and type a new value

2. To delete or Insert a new box:

• Choose the box and right click the mouse button for options available

3. Make sure the listed parameters in “script Detail” are in the exact order as shown here.

I2CSTART I2CWRTBYT 02 DC 9C I2CSTOP

Script Detail

This means there are two bytes to send 1st Write Byte: Address byte with W

/R bit = 1101-1100

2nd Write Byte: 1001-1100

* *

FIGURE 1-10: Modifying parameters in Script Builder window.

4. Change the parameter value:

Note: All six parameters above must be listed in order. The parameter above

marked with * character are not modifiable. Address bits (A2, A1, A0) = (1,1,0) if both JP2 and JP3 are tied to V

. You can use different address

bits by rearranging the connectors. See MCP3423 Data Sheet for more information on address bit sections.

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Quick Start Instructions

Address Byte

Configuration Byte

(9C)

Note: The “9C” in the configuration byte selects the following options:

- Conversion Mode: Continuous Conversion

- Channel Selection: Channel 1

- Bit Resolution: 18 bits

- Gain Selection: 1x

2 Bytes to send

FIGURE 1-11: Script file example for I2C Write Command.

1.3.2.2 SAVE THE SCRIPT FILE AND PROGRAMMING THE MCP3423 CONFIGURATION REGISTER

1. Change the 2

and 3rd data bytes you want in the Script Detail.

2. Type in any script name (i.e., MCP3423_Write) in the space below the “Script

Name” menu.

3. Click Save Script button.

4. Click Execute Script button.

Note: At this point, the PICkit Serial transmits the I

C Write Command to the MCP3423 device. The saved file name will appear in “Users I2C Scripts” column, and can be re-used any time by selecting the file name.

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MCP3423 Evaluation Board User’s Guide

Write Command with Address bits

Configuration Bits

Zoom-in

5. You can also see the SCL and SDA waveforms using the Oscilloscope.

Note: When you click on the “Execute Script” menu, the “Busy” LED on the PICkit

Serial Analyzer will momentarily turn on and then turn off. If the LED remains ON, a communications problem has occurred. Remove the PICkit Serial Analyzer from your computer and recheck the parameter values including the order of parameters under the “Script Detail” column, and try again until the “Busy” LED turns OFF immediately after sending the I command.

FIGURE 1-12: I

C Write Command Waveforms for the MCP3423.

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Quick Start Instructions

NAK Pulse

ACK Pulse

(a) The device does not acknowledge the write command.

(b) Send a General Call Latch Command.

1.3.3 Trouble Shooting: If the device does not acknowledge the commands

If the device is powered up initially with unstable VDD from the PICKit Serial, there is a chance that the device can latch a wrong address bits from the external address pins, and therefore it may not acknowledge the command bytes correctly since the address bits are not matched. In this case, send a General Call Latch Command after the V is stabilized (after about 20 seconds the PICKit Serial is powered). See the example in Figure 1-13. Another method is power-up the PICKit Serial first by connecting to the PC, then insert the MCP3423 EV board to the PICKit Serial about 20 seconds later.

FIGURE 1-13: Examples when the device is not acknowledging the write command. Send the General Call Latch Command when the V

is stabilized.

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MCP3423 Evaluation Board User’s Guide

I2CSTART I2CWRTBYT 01 DD I2CRDBYTNLB

I2CSTOP

Script Detail

This means there is one byte for address Address byte with W

/R bit = 1101-1101

5 bytes to read

* *

1.3.4 Reading the Conversion Data using the PICkit Serial Analyzer

You can read back the conversion data with the following steps.

1.3.4.1 CREATING SCRIPT FILE TO READ CONVERSION DATA

1. Click on ReadAddrA8 in “Example I2C Scripts” column. This will result in filling in the spaces under “Script Detail” column.

Now you can modify the parameter boxes (delete or insert) in the “Script Detail” column with options. The list of options will appear if you right-click the mouse in the parameter box. You can delete the parameter box or add a new one.

2. Make sure you have the “Script Detail” parameters listed in order as follows:

Note: All seven parameters above must be listed in order. The parameters above

marked with * character are not modifiable. Address bits (A2, A1, A0) = (1,1,0) if both JP2 and JP3 are tied to V can use different address bits by rearranging the JP1 and JP2 connectors. See MCP3423 Data Sheet for more information on address bit selections.

. You

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Quick Start Instructions

Requesting

5 Bytes

Address Byte

FIGURE 1-14: Script File sample to read conversion data.

3. Type in any script name (i.e., MCP3423_Read) in the space below the “Script

Name” menu.

4. Click Save Script button.

5. Click Execute Script button.

Note: At this point, the PICkit Serial transmits the I

MCP3423 device. The saved file name will appear in “Users I2C Scripts” column, and can be re-used any time by selecting the file name.

6. You can also see the SCL and SDA waveforms using the Oscilloscope.

Note: When you click on the “Execute Script” menu, the “Busy” LED on the PICkit

C Read Co mmand t o the

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MCP3423 Evaluation Board User’s Guide

5th Byte: Repeated Byte for Configuration byte

4th byte: Configuration Byte (note that RDYbit is “0”)

3rd byte: Data Byte

2nd byte: Data Byte

1st byte: Data Byte

Requesting

5 Bytes

Results:

Output code: F907 in hex ( = 63751 in decimal)

Output Voltage=

63751

15.625 μVLSB() PGA

--------------------------------------------

× 0.996 Volts with PGA 1==

Reading Data

using a Read Command

Note that if the differential input voltage is negative (CH- > CH+), the MSB of the first byte will be "1". In this case, the voltage is calculated after converting the output code to 2's complement and then multiply the LSB.

See Section 4.9 of the MCP3423 Data Sheet (DS22088) for more information.

FIGURE 1-15: Reading Conversion Results: Note that the Input = 0.996V is applied to CH1. The reading indicates the measured value is 0.996 Volts.

Page 25

Quick Start Instructions

Zoom-in

Data Bytes = 00F907 (hex)

Zoom-in

Configuration Byte (4th) and Repeated Configuration Byte (5th)

(a) Read command and outputs. The 3 data bytes are zoomed in for better clarity.

(b) Read command and outputs. The last two data bytes are zoomed in for better clarity.

4th Byte

5th Byte

FIGURE 1-16: Read Command and Data on I2C bus. Note the RDY bit in 4th byte is “0”. This means the conversion data just read is the latest conversion data. The RDY (repeated byte). This means the device is now in the process of new conversion and the new result is not ready yet.

bit becomes “1” in the 5th byte

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MCP3423 Evaluation Board User’s Guide

1.4 EXPERIMENT FOR CH2

Repeat the instructions from Section 1.3.2 “Creating Script Files” to Section 1.3.4 “Reading the Conversion Dat a using the PICkit Serial Analyzer” for

the input channel 2.

Page 27

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for the MCP3424 Evaluation Board:

• Board – Schematic

• Board – Top Layer

• Board – Top Metal Layer

• Board – Bottom Layer

• Board – Bottom Metal Layer

MCP3423 EVALUATION BOARD

USER ’S GUIDE

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MCP3423 Evaluation Board User’s Guide

A.2 BOARD – SCHEMATIC

Page 29

Schematic and Layouts

A.3 BOARD – TOP LAYER

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MCP3423 Evaluation Board User’s Guide

A.4 BOARD – TOP METAL LAYER

Page 31

A.5 BOARD – BOTTOM LAYER

Schematic and Layouts

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MCP3423 Evaluation Board User’s Guide

A.6 BOARD – BOTTOM METAL LAYER

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MCP3423 EVALUATION BOARD

USER ’S GUIDE

Appendix B. Bill of Materials (BOM)

TABLE B-1: BILL OF MATERIALS (BOM)

Qty Reference Description Manufacturer Part Number

1 C1 CAP .1UF 25V CERAMIC X7R 0805 Panasonic

1 C2 CAP CERAMIC 10UF 6.3V X5R 0805 Panasonic - ECG ECJ-2FB0J106K

1 D1 LED RED ORANGE CLEAR 0805 SMD LITE-ON INC LTST-C170EKT

2 R1,R3 RES 4.99K OHM 1/8W 1% 0805 SMD Panasonic - ECG ERJ-6ENF4991V

1 R5 RES 470 OHM 1/8W 5% 0805 SMD Panasonic - ECG ERJ-6GEYJ471V

1 J1 CONN HEADER 6POS .100 R/A TIN Molex

Electronics

1 JP1 CONN HEADER 2POS .100 VERT TIN Molex/Waldom

Electronics

2 JP2,JP3 CONN HEADER 3POS .100" STR TIN Molex/Waldom

Electronics

1 PCB RoHS Compliant Bare PCB, MCP3423

Evaluation Board for PICkit Serial

3 Shunts for

JP1, JP2, JP3

2 R2,R4 DO NOT POPULATE — —

1 U1 2 Channel 18 Bit Data Sigma ADC Microchip Technology

14 VDD1,

CH1+, CH1-, CH2+, CH2-, A0, A1, SCL, SDA, GND

Note 1: The components listed in this Bill of Materials are representative of the PCB assembly. The released BOM

used in manufacturing uses all RoHS-compliant components.

100" Shorting Block with Handle JAMECO Value-Pro 2012JH-R

TEST POINT PC COMPACT SMT Keystone Electronics® 5016

Microchip Technology Inc.

Inc.

- ECG ECJ-2VB1E104K

/ Waldom®

22-05-2061

22-03-2021

90120-0123

104-00230

MCP3423-E/ST

Page 34

WORLDWIDE SALES AND SERVICE

AMERICAS

Corporate Office

2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://support.microchip.com Web Address: www.microchip.com

Atlanta

Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455

Boston

Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088

Chicago

Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075

Dallas

Addison, TX Tel: 972-818-7423 Fax: 972-818-2924

Detroit

Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260

Kokomo

Kokomo, IN Tel: 765-864-8360 Fax: 765-864-8387

Los Angeles

Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608

Santa Clara

Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445

Toronto

Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509

ASIA/PACIFIC

Asia Pacific Office

Suites 3707-14, 37th Floor Tower 6, The Gateway Harbour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431

Australia - Sydney

Tel: 61-2-9868-6733 Fax: 61-2-9868-6755

China - Beijing

Tel: 86-10-8528-2100 Fax: 86-10-8528-2104

China - Chengdu

Tel: 86-28-8665-5511 Fax: 86-28-8665-7889

China - Hong Kong SAR

Tel: 852-2401-1200 Fax: 852-2401-3431

China - Nanjing

Tel: 86-25-8473-2460 Fax: 86-25-8473-2470

China - Qingdao

Tel: 86-532-8502-7355 Fax: 86-532-8502-7205

China - Shanghai

Tel: 86-21-5407-5533 Fax: 86-21-5407-5066

China - Shenyang

Tel: 86-24-2334-2829 Fax: 86-24-2334-2393

China - Shenzhen

Tel: 86-755-8203-2660 Fax: 86-755-8203-1760

China - Wuhan

Tel: 86-27-5980-5300 Fax: 86-27-5980-5118

China - Xiamen

Tel: 86-592-2388138 Fax: 86-592-2388130

China - Xian

Tel: 86-29-8833-7252 Fax: 86-29-8833-7256

China - Zhuhai

Tel: 86-756-3210040 Fax: 86-756-3210049

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-4182-8400 Fax: 91-80-4182-8422

India - New Delhi

Tel: 91-11-4160-8631 Fax: 91-11-4160-8632

India - Pune

Tel: 91-20-2566-1512 Fax: 91-20-2566-1513

Japan - Yokohama

Tel: 81-45-471- 6166 Fax: 81-45-471-6122

Korea - Daegu

Tel: 82-53-744-4301 Fax: 82-53-744-4302

Korea - Seoul

Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934

Malaysia - Kuala Lumpur

Tel: 60-3-6201-9857 Fax: 60-3-6201-9859

Malaysia - Penang

Tel: 60-4-227-8870 Fax: 60-4-227-4068

Philippines - Manila

Tel: 63-2-634-9065 Fax: 63-2-634-9069

Singapore

Tel: 65-6334-8870 Fax: 65-6334-8850

Taiwan - Hsin Chu

Tel: 886-3-572-9526 Fax: 886-3-572-6459

Taiwan - Kaohsiung

Tel: 886-7-536-4818 Fax: 886-7-536-4803

Taiwan - Taipei

Tel: 886-2-2500-6610 Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351 Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-39 Fax: 43-7242-2244-393

Denmark - Copenhagen

Tel: 45-4450-2828 Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0 Fax: 49-89-627-144-44

Italy - Milan

Tel: 39-0331-742611 Fax: 39-0331-466781

Netherlands - Drunen

Tel: 31-416-690399 Fax: 31-416-690340

Spain - Madrid

Tel: 34-91-708-08-90 Fax: 34-91-708-08-91

UK - Wokingham

Tel: 44-118-921-5869 Fax: 44-118-921-5820

01/02/08

Microchip Technology MCP3423 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 MCP3423 EVALUATION BOARD

1.3 GETTING STARTED WITH PICKIT SERIAL ANALYZER

1.4 EXPERIMENT FOR CH2

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

A.2 BOARD – SCHEMATIC

A.3 BOARD – TOP LAYER

A.4 BOARD – TOP METAL LAYER

A.5 BOARD – BOTTOM LAYER

A.6 BOARD – BOTTOM METAL LAYER

Appendix B. Bill of Materials (BOM)

WORLDWIDE SALES AND SERVICE