Microchip Technology MCP4725 SOT-23-6 User Manual
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Microchip Technology MCP4725 SOT-23-6 User Manual

Microchip Technology MCP4725 SOT-23-6 User Manual

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MCP4725
SOT-23-6
Evaluation Board
User's Guide
© 2007 Microchip Technology Inc.
DS51669A

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Summary of Contents for Microchip Technology MCP4725 SOT-23-6

  • Page 1 MCP4725 SOT-23-6 Evaluation Board User’s Guide © 2007 Microchip Technology Inc. DS51669A...
  • Page 2 U.S.A. and other countries. and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No SQTP is a service mark of Microchip Technology Incorporated licenses are conveyed, implicitly or otherwise, under any in the U.S.A.

  • Page 3: Table Of Contents

    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 ....................
  • Page 4 MCP4725 SOT-23-6 Evaluation Board User’s Guide NOTES: © 2007 Microchip Technology Inc. DS51669A-page iv...

  • Page 5: Preface

    • Customer Support • Document Revision History DOCUMENT LAYOUT This document describes how to use the MCP4725 SOT-23-6 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 MCP4725 SOT-23-6 Evaluation Board and instructions on how to program the DAC register and EEPROM of the MCP4725 device.

  • Page 6: Conventions Used In This Guide

    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...

  • Page 7: Recommended Reading

    Preface RECOMMENDED READING This user's guide describes how to use MCP4725 SOT-23-6 Evaluation Board. The following Microchip documents are 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: Document Revision History

    MCP4725 SOT-23-6 Evaluation Board User’s Guide DOCUMENT REVISION HISTORY Revision A (October 2007) • Initial Release of this Document. © 2007 Microchip Technology Inc. DS51669A-page 4...

  • Page 9: Chapter 1. Quick Start Instructions

    (less than 1 kΩ) for the high-speed mode (3.4 MHz) 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.
  • Page 10 MCP4725 SOT-23-6 Evaluation Board User’s Guide JP1: A0 selection jumper: Picture shown here is connected to the GND (A0 = 0) MCP4725 in SOT-23-6 package J1 Connector Ground Terminal Analog Output Terminal Terminal R1 (Pull-up Resistor for SDA) R3 (Pull-up Resistor for SCL) FIGURE 1-1: MCP4725 SOT-23-6 Evaluation Board.
  • Page 11 This section describes how to evaluate the MCP4725 device using the PICkit Serial Analyzer. 1.3.1.1 HARDWARE SET-UP 1. Connect the MCP4725 SOT-23-6 Evaluation Board and the PICkit Serial Analyzer together using the J1 connector. 2. Connect a USB cable between the PICkit Serial Analyzer and a Personal Computer.
  • Page 12 MCP4725 SOT-23-6 Evaluation Board User’s Guide 1.3.1.2 PICKIT SERIAL ANALYZER PC SOFTWARE SET-UP FOR DAC DEVICE PROGRAMMING AND ANALOG VOLTAGE OUTPUT MEASUREMENT 1. Install the PICkit Serial Analyzer software in your computer. 2. Connect the USB cable between the PICkit Serial Analyzer and your PC.
  • Page 13 I C bus data rate up to 400 kHz. 6. Select No on Device Pullups and click the Next > button. Note: The MCP4725 SOT-23-6 Evaluation Board has its own pull-up resistors © 2007 Microchip Technology Inc. DS51669A-page 9...
  • Page 14 If you choose PICkit Serial will power my device option, and the 5 Volt option as shown below, the MCP4725 SOT-23-6 Evaluation Board is powered by the 5 VDC from the PICkit Serial Analyzer through the J1 connector. In this case, make sure that the JP2 jumper on the MCP4725 SOT-23-6 Evaluation Board is con- nected.
  • Page 15 Quick Start Instructions 8. Click the OK button. You have done all PICkit Serial Analyzer Configuration Set-up. You are now ready to program the MCP4725 device using the PICkit Serial Analyzer. © 2007 Microchip Technology Inc. DS51669A-page 11...
  • Page 16 MCP4725 SOT-23-6 Evaluation Board User’s Guide 1.3.2 Creating Script File to program the DAC Register and EEPROM Data 1. From the Communications tab, select the Script option and go to the Script Builder. © 2007 Microchip Technology Inc. DS51669A-page 12...
  • Page 17 You can choose any data you want for the 2nd and 3rd write bytes. If you use the above write data, the MPC4725 device will output: * 0.5V. 1st Write Byte 2nd Write Byte 3rd Write Byte © 2007 Microchip Technology Inc. DS51669A-page 13...
  • Page 18 MCP4725 SOT-23-6 Evaluation Board User’s Guide 3. Programming DAC Register (Fast Mode) a) Change 2nd and 3rd data bytes you want in the Script Detail. b) Click Execute Script Menu item. c) The device gives an analog output voltage (V ) at the VOUT terminal on the board.
  • Page 19 -----------> 1st Write Byte: Address byte = 1100-0000 -----------> 2nd Write Byte: 0110-0000 -----------> 3rd Write Byte: 1000-0000 -----------> 4th Write Byte: 0000-0000 I2CSTOP 1st Write Byte 2nd Write Byte 3rd Write Byte 4th Write Byte © 2007 Microchip Technology Inc. DS51669A-page 15...
  • Page 20 EEPROM. The data in the EEPROM is non-volatile. To check this non-volatile data, you can remove the V from the MCP4725 SOT-23-6 Evaluation Board once, and bring back up the V again. You will see the same analog voltage output at the V terminal.
  • Page 21 (a) Write the DAC Register with Fast Mode Command. (b) Send Read Command and see the results on the PICkit Serial Transactions page. Requesting 3 Bytes Written Data using a Write Command Reading Data using a Read Command © 2007 Microchip Technology Inc. DS51669A-page 17...
  • Page 22 MCP4725 SOT-23-6 Evaluation Board User’s Guide 7. Reading both the DAC Register and EEPROM data. This experiment can be done by two steps: (a) Write the DAC Register and EEPROM data using a write command. (b) Send Read Command (Request 5 bytes) and see the results on the PICkit Serial Transactions page.
  • Page 23 0 PD1 PD0 D11 D10 D9 D8 D8 D7 D4 D3 STOP Address Byte: 0x08 0x00 when A2 = A1 = A0 = 0 FIGURE 1-4: Fast Mode (Write Command) for V = 2.5V when V = 5V. © 2007 Microchip Technology Inc. DS51669A-page 19...
  • Page 24 MCP4725 SOT-23-6 Evaluation Board User’s Guide × × 5V 2 DAC Output ------------------------- - -------------------- - 2.5V 4096 4096 Start 0xC0 X PD1 PD0 X D11 D10 D7 D6 When A2 = A1 = A0 = 0 0x60 0x08 = 2...

  • Page 25: Appendix A. Schematics And Board Layouts

    This appendix contains the following schematics and layouts for the MCP4725 SOT-23-6 Evaluation Board: • Board – Schematic • Board – Top Layer • Board – Top Silk Layer • Board – Bottom Metal Layer © 2007 Microchip Technology Inc. DS51669A-page 21...

  • Page 26: Board - Schematic

    MCP4725 SOT-23-6 Evaluation Board User’s Guide BOARD - SCHEMATIC © 2007 Microchip Technology Inc. DS51669A-page 22...

  • Page 27: Board - Top Layer

    Schematics and Board Layouts BOARD - TOP LAYER © 2007 Microchip Technology Inc. DS51669A-page 23...

  • Page 28: Board - Top Silk Layer

    MCP4725 SOT-23-6 Evaluation Board User’s Guide BOARD - TOP SILK LAYER © 2007 Microchip Technology Inc. DS51669A-page 24...

  • Page 29: Board - Bottom Layer

    Schematics and Board Layouts BOARD - BOTTOM LAYER © 2007 Microchip Technology Inc. DS51669A-page 25...
  • Page 30 MCP4725 SOT-23-6 Evaluation Board User’s Guide NOTES: © 2007 Microchip Technology Inc. DS51669A-page 26...

  • Page 31: Appendix B. Bill Of Materials (Bom)

    — — MCP4725_SOT-23-6 Microchip Technology Inc. MCP4725_SOT-23-6 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. © 2007 Microchip Technology Inc. DS51669A-page 27...

  • Page 32: Worldwide Sales And Service

    Fax: 86-757-2839-5571 Fax: 886-2-2508-0102 Toronto China - Wuhan Thailand - Bangkok Mississauga, Ontario, Tel: 86-27-5980-5300 Tel: 66-2-694-1351 Canada Fax: 86-27-5980-5118 Fax: 66-2-694-1350 Tel: 905-673-0699 China - Xian Fax: 905-673-6509 Tel: 86-29-8833-7252 Fax: 86-29-8833-7256 10/05/07 © 2007 Microchip Technology Inc. DS51669A-page 28...
  • Page 33 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Microchip MCP4725EV...

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