Microchip Technology MCP3421 SOT23-6 User Manual Download Page 2

DS51793A-page ii

©

 2009 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and may be superseded by updates.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.
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

EE

L

OQ

, K

EE

L

OQ

 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

32

 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.

© 2009, Microchip Technology Incorporated, Printed in the 
U.S.A., All Rights Reserved.

 Printed on recycled paper.

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.

Microchip received ISO/TS-16949:2002 certification for its worldwide 
headquarters, design and wafer fabrication facilities in Chandler and 
Tempe, Arizona; Gresham, Oregon and design centers in California 
and India. The Company’s quality system processes and procedures 
are for its PIC

®

 

MCUs and dsPIC

®

 DSCs, K

EE

L

OQ

®

 

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.

Summary of Contents for MCP3421 SOT23-6

Page 1: ...2009 Microchip Technology Inc DS51793A MCP3421 SOT23 6 Evaluation Board User s Guide...

Page 2: ...hnology Incorporated in the U S A All other trademarks mentioned herein are property of their respective companies 2009 Microchip Technology Incorporated Printed in the U S A All Rights Reserved Print...

Page 3: ...Customer Support 3 Document Revision History 4 Chapter 1 Quick Start Instructions 1 1 Introduction 5 1 2 Description of the MCP3421 SOT23 6 Evaluation Board 5 1 3 Getting Started with PICkit Serial A...

Page 4: ...MCP3421 SOT23 6 Evaluation Board User s Guide DS51793A page iv 2009 Microchip Technology Inc NOTES...

Page 5: ...nalyzer Appendix A Schematic and Layouts shows the schematic and layout diagrams for the MCP3421 SOT23 6 Evaluation Board Appendix B Bill Of Materials BOM lists the parts used to build the MCP3421 SOT...

Page 6: ...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...

Page 7: ...ollowing 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 so...

Page 8: ...MCP3421 SOT23 6 Evaluation Board User s Guide DS51793A page 4 2009 Microchip Technology Inc DOCUMENT REVISION HISTORY Revision A January 2009 Initial Release of this Document...

Page 9: ...ial Analyzer s PC graphic user interface GUI provides the user s interface for writing configuration register bits of the MCP3421 and displays the ADC conversion values The PICkit Serial Analyzer link...

Page 10: ...MCP3421 SOT23 6 Evaluation Board User s Guide DS51793A page 6 2009 Microchip Technology Inc FIGURE 1 1 Front and Back Views of the MCP3421 SOT23 6 Evaluation Board...

Page 11: ...sed pin example VIN to VSS 7 Use the PICkit Serial Analyzer PC GUI to send I2C write and read commands See Section 1 3 2 1 Creating a Script File for Configuration Byte Writing 8 Execute the PICkit Se...

Page 12: ...Microchip Technology Inc FIGURE 1 2 MCP3421 SOT23 6 Evaluation Board with the PICkit Serial Analyzer PICkit Serial Analyzer MCP3421 Evaluation Board USB Cable Connected between the and Personal Comput...

Page 13: ...ion Board and read the ADC conversion results 1 Install the PICkit Serial Analyzer software onto your personal computer PC 2 Connect the USB cable between the PICkit Serial Analyzer and your PC 3 Run...

Page 14: ...t No on Enable Pull ups and click the Next button FIGURE 1 6 Step 3 Device Pullups Window Note The MCP3421 device supports the I2 C bus data rate up to 3 4 MHz but the current version of the PICkit Se...

Page 15: ...Volt as shown below the MCP3421 SOT23 6 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 MCP3421 SOT23...

Page 16: ...9 Microchip Technology Inc 8 Click the OK button You have made all of the PICkit Serial Analyzer configura tion set ups You are now ready to program the MCP3421 SOT23 6 Evaluation Board using the PICk...

Page 17: ...order to make a communication between the PICkit Serial Analyzer and the MCP3421 SOT23 6 Evaluation Board a script file is needed The following procedure shows how to create script files and how to us...

Page 18: ...e 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 displaying the options that are available for the param...

Page 19: ...means there are two bytes to send 1st Write Byte Address byte with W R bit 1101 0000 2nd Write Byte 1001 1100 Note All 6 parameters above must be listed in the same order as shown here The parameter a...

Page 20: ...Technology Inc FIGURE 1 11 Script File Example for the I2 C Write Command 2 Bytes to send Address Byte Configuration Byte 9C Note that the 9C in the configuration byte selects the following options C...

Page 21: ...this point the PICkit Serial transmits the I2C Write Command to the MCP3421 device The saved file name will appear in Users I2C Scripts column and can be re used any time by selecting the file name No...

Page 22: ...he Script Detail column with options The list of options will appear if you click the right mouse button at the parameter box You can delete the parameter box or add a new one Make sure you have the S...

Page 23: ...ial transmits the I2 C Read Command to the MCP3421 device The saved file name will appear in Users I2C Scripts column and can be re used any time by selecting the file name Note When you click on the...

Page 24: ...307V See Figure 1 15 for waveforms 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 Output code...

Page 25: ...4th byte the RDY bit becomes 1 in the 5th byte repeated byte This means the device is now in the process of a new conversion and the latest conversion result is not ready yet Zoom in Data Bytes 0101A...

Page 26: ...MCP3421 SOT23 6 Evaluation Board User s Guide DS51793A page 22 2009 Microchip Technology Inc NOTES...

Page 27: ...ip Technology Inc DS51793A page 23 Appendix A Schematic and Layouts A 1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP3421 SOT23 6 Evaluation Board Board Schemati...

Page 28: ...MCP3421 SOT23 6 Evaluation Board User s Guide DS51793A page 24 2009 Microchip Technology Inc A 2 BOARD SCHEMATIC...

Page 29: ...Schematic and Layouts 2009 Microchip Technology Inc DS51793A page 25 A 3 BOARD TOP LAYER...

Page 30: ...MCP3421 SOT23 6 Evaluation Board User s Guide DS51793A page 26 2009 Microchip Technology Inc A 4 BOARD TOP METAL LAYER...

Page 31: ...Schematic and Layouts 2009 Microchip Technology Inc DS51793A page 27 A 5 BOARD BOTTOM METAL LAYER...

Page 32: ...MCP3421 SOT23 6 Evaluation Board User s Guide DS51793A page 28 2009 Microchip Technology Inc NOTES...

Page 33: ...A TIN Molex Waldom Electronics Corp 22 05 2061 1 PCB RoHS Compliant Bare PCB MCP3421EV 104 00124 2 R1 R3 RES 4 99K OHM 1 8W 1 0805 SMD Panasonic ECG ERJ 6ENF4991V 2 R2 R4 DO NOT POPULATE 1 R5 RES 470...

Page 34: ...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 7...

Page 35: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Microchip MCP3421EV...

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