Microchip Technology MCP3423 User Manual
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Microchip Technology MCP3423 User Manual

Microchip Technology MCP3423 User Manual

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MCP3423

Evaluation Board

User's Guide
© 2008 Microchip Technology Inc.
DS51778A

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Summary of Contents for Microchip Technology MCP3423

  • Page 1: Evaluation Board

    MCP3423 Evaluation Board User’s Guide © 2008 Microchip Technology Inc. DS51778A...
  • Page 2 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.

  • Page 3: Table Of Contents

    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 ....................
  • Page 4 MCP3423 Evaluation Board User’s Guide NOTES: © 2008 Microchip Technology Inc. DS51778A-page iv...

  • Page 5: Preface

    • 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.

  • Page 6: Conventions Used In This Guide

    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...

  • Page 7: Recommended Reading

    Preface RECOMMENDED READING This user's guide describes how to use MCP3423 Evaluation Board. Other useful documents are listed below. The following Microchip document is available and recommended as supplemental reference resources: PICkit™ Serial Analyzer User’s Guide (DS51647) Consult this document for instructions on how to use the PICkit Serial Analyzer hardware and software.
  • Page 8 MCP3423 Evaluation Board User’s Guide NOTES: © 2008 Microchip Technology Inc. DS51778A-page 4...

  • Page 9: Chapter 1. Quick Start Instructions

    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.

  • Page 10: Getting Started With Pickit Serial Analyzer

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

  • Page 11: Quick Start Instructions

    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 is powered-up.
  • Page 12 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).
  • Page 13 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. © 2008 Microchip Technology Inc. DS51778A-page 9...
  • Page 14 Next button. FIGURE 1-5: Step 2 - I C Communication Speed window. The MCP3423 device supports the I C bus data rate up to 3.4 MHz, but the Note: current version of the PICkit Serial Analyzer supports the I C bus data rate up to 400 kHz only.
  • Page 15 If you choose PICkit Serial will power your device 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.
  • Page 16 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.
  • Page 17 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 Communications>...
  • Page 18 * 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. © 2008 Microchip Technology Inc.
  • Page 19 At this point, the PICkit Serial transmits the I C Write Command to the Note: 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. © 2008 Microchip Technology Inc.
  • Page 20 “Script Detail” column, and try again until the “Busy” LED turns OFF immediately after sending the I command. Zoom-in Zoom-in Write Command with Address bits Configuration Bits FIGURE 1-12: C Write Command Waveforms for the MCP3423. © 2008 Microchip Technology Inc. DS51778A-page 16...
  • Page 21 (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. (a) The device...
  • Page 22 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 JP1 and JP2 connectors. See MCP3423 Data Sheet for more information on address bit selections. © 2008 Microchip Technology Inc. DS51778A-page 18...
  • Page 23 C Read Command to the Note: 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.
  • Page 24 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.
  • Page 25 The RDY bit becomes “1” in the 5th byte (repeated byte). This means the device is now in the process of new conversion and the new result is not ready yet. © 2008 Microchip Technology Inc. DS51778A-page 21...

  • Page 26: Experiment For Ch2

    MCP3423 Evaluation Board User’s Guide EXPERIMENT FOR CH2 Repeat the instructions from Section 1.3.2 “Creating Script Files” to Section 1.3.4 “Reading the Conversion Data using the PICkit Serial Analyzer” for the input channel 2. © 2008 Microchip Technology Inc. DS51778A-page 22...

  • Page 27: Appendix A. Schematic And Layouts

    This appendix contains the following schematics and layouts for the MCP3424 Evalu- ation Board: • Board – Schematic • Board – Top Layer • Board – Top Metal Layer • Board – Bottom Layer • Board – Bottom Metal Layer © 2008 Microchip Technology Inc. DS51778A-page 23...

  • Page 28: Board - Schematic

    MCP3423 Evaluation Board User’s Guide BOARD – SCHEMATIC © 2008 Microchip Technology Inc. DS51778A-page 24...

  • Page 29: Board - Top Laer

    Schematic and Layouts BOARD – TOP LAYER © 2008 Microchip Technology Inc. DS51778A-page 25...

  • Page 30: Board - Top Metal Layer

    MCP3423 Evaluation Board User’s Guide BOARD – TOP METAL LAYER © 2008 Microchip Technology Inc. DS51778A-page 26...

  • Page 31: Board - Bottom Layer

    Schematic and Layouts BOARD – BOTTOM LAYER © 2008 Microchip Technology Inc. DS51778A-page 27...

  • Page 32: Board - Bottom Metal Layer

    MCP3423 Evaluation Board User’s Guide BOARD – BOTTOM METAL LAYER © 2008 Microchip Technology Inc. DS51778A-page 28...

  • Page 33: Appendix B. Bill Of Materials (Bom)

    CONN HEADER 2POS .100 VERT TIN Molex/Waldom 22-03-2021 Electronics JP2,JP3 CONN HEADER 3POS .100" STR TIN Molex/Waldom 90120-0123 Electronics RoHS Compliant Bare PCB, MCP3423 Microchip Technology 104-00230 Evaluation Board for PICkit Serial Inc. Shunts for 100" Shorting Block with Handle JAMECO Value-Pro 2012JH-R...

  • Page 34: Worldwide Sales And Service

    Fax: 86-592-2388130 Fax: 886-2-2508-0102 Toronto China - Xian Thailand - Bangkok Mississauga, Ontario, Tel: 86-29-8833-7252 Tel: 66-2-694-1351 Canada Fax: 86-29-8833-7256 Fax: 66-2-694-1350 Tel: 905-673-0699 Fax: 905-673-6509 China - Zhuhai Tel: 86-756-3210040 Fax: 86-756-3210049 01/02/08 © 2008 Microchip Technology Inc. DS51778A-page 30...

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