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Microchip Technology MCP4725 SOT-23-6 User Manual Download Page 24

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

DS51669A-page 20

©

 2007 Microchip Technology Inc.

FIGURE 1-5:

Write Command Example for EEPROM and DAC Register for V

OUT

 = 2.5V when 

V

REF

 = 5V.

x

STOP

D3

D1

D2

D0

ACK

x

x

x

0x00

D4

D5

0x60

0x08 = 2

11

When A2 = A1 = A0 = 0

DAC Output

V

REF

D

N

×

4096

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

5V

2

11

×

4096

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

2.5V

=

=

=

ACK

Start

0

0xC0

1

1

X

X PD1 PD0 X

D11 D10

D8

D9

D7 D6

ACK

ACK

Summary of Contents for MCP4725 SOT-23-6

Page 1: ...2007 Microchip Technology Inc DS51669A MCP4725 SOT 23 6 Evaluation Board User s Guide...

Page 2: ...QTP is a service mark of Microchip Technology Incorporated in the U S A All other trademarks mentioned herein are property of their respective companies 2007 Microchip Technology Incorporated Printed...

Page 3: ...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 Analyz...

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

Page 5: ...Appendix A Schematics and Board Layouts shows the schematic and lay out diagrams for the MCP4725 SOT 23 6 Evaluation Board Appendix B Bill Of Materials BOM lists the parts used to build the MCP4725 SO...

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: ...upport 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 Suppo...

Page 8: ...MCP4725 SOT 23 6 Evaluation Board User s Guide DS51669A page 4 2007 Microchip Technology Inc DOCUMENT REVISION HISTORY Revision A October 2007 Initial Release of this Document...

Page 9: ...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 k for the I2 C pull up resistors This 5 k supports up to...

Page 10: ...nology Inc FIGURE 1 1 MCP4725 SOT 23 6 Evaluation Board 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 t...

Page 11: ...al Analyzer together using the J1 connector 2 Connect a USB cable between the PICkit Serial Analyzer and a Personal Computer 3 Connect a Digital Voltmeter to VOUT and GND terminals on the MCP4725 SOT...

Page 12: ...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 3 Run the PICkit Serial PC Software It will op...

Page 13: ...k the Next button 6 Select No on Device Pullups and click the Next button Note The MCP4725 SOT 23 6 Evaluation Board supports the I2 C bus data rate up to 3 4 MHz but the current version of the PICkit...

Page 14: ...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 You can also cl...

Page 15: ...ctions 2007 Microchip Technology Inc DS51669A page 11 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 PICk...

Page 16: ...ion Board User s Guide DS51669A page 12 2007 Microchip Technology Inc 1 3 2 Creating Script File to program the DAC Register and EEPROM Data 1 From the Communications tab select the Script option and...

Page 17: ...g parameters in order in the text box area provided in the Script Detail box I2CSTART I2CWRTBYT 03 C0 08 00 I2CSTOP Script Detail This means there are three bytes to send 1st Write Byte Address byte 1...

Page 18: ...A page 14 2007 Microchip Technology Inc 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...

Page 19: ...r in the spaces below the Script Detail menu and click on the Execute Script button I2CSTART I2CWRTBYT 04 C0 80 00 I2CSTOP Script Detail 60 This means Master will send four bytes 1st Write Byte Addres...

Page 20: ...er sending the EEPROM write command in Step 4 the device holds the data in the EEPROM The data in the EEPROM is non volatile To check this non volatile data you can remove the VDD from the MCP4725 SOT...

Page 21: ...er Data using the PICkit Serial Analyzer This experiment can be done in two steps a Write the DAC Register with Fast Mode Command b Send Read Command and see the results on the PICkit Serial Transacti...

Page 22: ...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 Transa...

Page 23: ...A1 A0 R W Device Code Address Byte Address Byte A2 A1 0 for Default Samples A0 0 if A0 pin is Grounded 1 if A0 pin is tied to VDD EXAMPLE Write Mode 0XC0 FOR A2 A1 A0 0XC2 FOR A2 A1 0 A0 TIED TO VDD...

Page 24: ...Technology Inc FIGURE 1 5 Write Command Example for EEPROM and DAC Register for VOUT 2 5V when VREF 5V x STOP D3 D1 D2 D0 ACK x x x 0x00 D4 D5 0x60 0x08 211 When A2 A1 A0 0 DAC Output VREF DN 4096 5V...

Page 25: ...hnology Inc DS51669A page 21 Appendix A Schematics and Board Layouts A 1 INTRODUCTION This appendix contains the following schematics and layouts for the MCP4725 SOT 23 6 Evaluation Board Board Schema...

Page 26: ...MCP4725 SOT 23 6 Evaluation Board User s Guide DS51669A page 22 2007 Microchip Technology Inc A 2 BOARD SCHEMATIC...

Page 27: ...Schematics and Board Layouts 2007 Microchip Technology Inc DS51669A page 23 A 3 BOARD TOP LAYER...

Page 28: ...MCP4725 SOT 23 6 Evaluation Board User s Guide DS51669A page 24 2007 Microchip Technology Inc A 4 BOARD TOP SILK LAYER...

Page 29: ...Schematics and Board Layouts 2007 Microchip Technology Inc DS51669A page 25 A 5 BOARD BOTTOM LAYER...

Page 30: ...MCP4725 SOT 23 6 Evaluation Board User s Guide DS51669A page 26 2007 Microchip Technology Inc NOTES...

Page 31: ...orp 22 28 8062 2 JP1 JP2 CONN HEADER 2POS 100 VERT TIN Molex Waldom Electronics Corp 22 28 4020 2 JP1 JP2 CONN JUMPER SHORTING GOLD FLASH Sullins Electronics Corp SPC02SYAN 1 PCB RoHS Compliant Bare P...

Page 32: ...407 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 Shunde Tel 86 757 2839 5507 Fax 86 757 2839 5571 China Wuhan Tel 86 27 59...

Page 33: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Microchip MCP4725EV...

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