Microchip Technology MCP4728 User’s Guide

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MCP4728

Evaluation Board

User’s Guide

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MCP4728 EVALUATION BOARD

USER ’S GUIDE

Table of Contents

Preface ...........................................................................................................................1

Introduction............................................................................................................1

Document Layout..................................................................................................1

Conventions Used in this Guide............................................................................2

Recommended Reading........................................................................................2

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 MCP4728 Evaluation Board ..............................................5

1.3 Getting Started with PICkit Serial Analyzer ....................................................7

Appendix A. Schematic and Layouts

A.1 Introduction ..................................................................................................35

A.2 Board – Schematic .......................................................................................36

A.3 Board – Top Silk, Top Pads and Top Copper .............................................. 37

A.4 Board – Top Copper and Pads .................................................................... 38

A.5 Board – Top Pads and Silk .......................................................................... 39

A.6 Board – Bottom Copper Layer ..................................................................... 40

Appendix B. Bill Of Materials (BOM) Appendix C. MCP4728 Read/Write Commands

C.1 Introduction ..................................................................................................43

Worldwide Sales and Service ....................................................................................46

MCP4728 Evaluation Board User’s Guide

NOTES:

MCP4728 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 MCP4728 Evaluation Board. Items discussed in this chapter include:

• Document Layout

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Customer Support

DOCUMENT LAYOUT

This document describes how to use the MCP47 28 Evalu a tio n Boa rd with PICkitTM Serial Analyzer. The manual layout is as follows:

• Chapter 1. “Quick Start Instructions” – this chapter provide s an overview of the MCP4728 Evaluation Board and instructions on how to use the MCP4728 Evaluation Board with the PICkit

• Appendix A. “Schematic and Layouts” – shows the schematic and layout diagrams for the MCP4728 Evaluation Board.

• Appendix B. “Bill Of Materials (BOM)” – lists the parts used to build the MCP4728 Evaluation Board.

• Appendix C. “MCP4728 Read/Write Commands” – shows the read/write commands for the MCP4728 Evaluation Board.

Serial Analyzer.

MCP4728 Evaluation Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Code (Courier font):

Plain characters Sample code

Filenames and paths Angle brackets: < > Variables <label>, <exp> Square brackets [ ] Optional arguments MPASMWIN [main.asm] Curly brackets and pipe

character: { | } Lowercase characters in

quotes Ellipses... Used to imply (but not show) addi-

0xnnn A hexadecimal number where n is a

Italic characters A variable argument; it can be either a

Interface (Arial font):

Underlined, italic text with right arrow

Bold characters A window or dialog button to click OK, Cancel Characters in angle

brackets < >

Documents (Arial font):

Italic characters Referenced books MPLAB

Choice of mutually exclusive argu-

ments; An OR selection

Type of data

tional text that is not relevant to the

example

hexadecimal digit

type of data (in lowercase characters)

or a specific example (in uppercase

characters).

A menu selection from the menu bar File > Save

A key on the keyboard <Tab>, <Ctrl-C>

#define START c:\autoexec.bat

errorlevel {0|1}

“filename”

list

[“list_option...,

“list_option”]

0xFFFF, 0x007A

char isascii (char, ch);

IDE User’s Guide

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 Guide, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

• Development Systems Information Line

Customers should contact their distributor, representative or field application engineer (FAE) for support. Lo cal 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

Preface

DOCUMENT REVISION HISTORY

Revision A (June 2009)

• Initial Release of this Document.

MCP4728 Evaluation Board User’s Guide

NOTES:

MCP4728 EVALUATION BOARD

USER ’S GUIDE

Chapter 1. Quick Start Instructions

1.1 INTRODUCTION

The following sections provide an overview of the MCP4728 Evaluation Board and instructions on how to program the DAC register and the EEPROM of the MCP4728 using the PICkit

• Description of the MCP4728 Evaluation Board

• How to use the MCP4728 Evaluation Board with the PICkit Serial Analyzer

1.2 DESCRIPTION OF THE MCP4728 EVALUATION BOARD

The purpose of the MCP4728 Evaluation Board is to provide an easy way o f evaluating the MCP4728’s performance and functionality with a minimum of work.

The MCP4728 Evaluation Board contains a MCP4728 (which is a 4-channel, 12-bit Digital-to-Analog Converter), an interface conn ector for the PICkit Serial Analyzer, and

C test point terminals.The user can evaluate this board by using the PICkit Serial Analyzer or by providing the I terminals.

Using the MCP4728 Evaluation Board, the user can evaluate the functionality of the MCP4728 device, such as: (a) Writing and reading the DAC registers and EEPROM of each channel, (b) Selecting the reference voltage, (c) Measuring the DAC output voltage, (d) Checking the LDAC

The MCP4728 Evaluation Board is designed to work friendly with the PICkit Serial Analyzer (DV164122). The PICkit Serial Analyzer (P/N: DV164122) is used for writing and reading the DAC configuration and register data. The PICkit Serial Analyzer consists of hardware and PC GUI. It is highly recommended that the users order this MCP4728 Evaluation Board and the PICkit Serial Analyze r at same tim e.

• The MCP4728 supports sta ndard mode (100kHz), fast mode (400 kHz), and high

speed mode (3.4 MHz) of the I has 5 kΩ for the I needs to evaluate the device with high speed mode (3.4 MHz), please replace the R1 and R2 with lower values (less than 1 kΩ).

Serial Analyzer. The following sections cover the topics:

C serial communication signals through the I2C test

pin feature, etc.

C pull-up resistors and supports up to the fast mode. If the user

C serial communications. This evaluation boar d

Note: The MCP4728 Evaluation Board can be used without the PICkit Serial

Analyzer as long as the V connector. This board does not include MCU.

The MCP4728 Evaluation Board has test points for SDL, SDA, and DAC outputs. By connecting an oscilloscope to these I communications through the I V

terminals) using a multimeter. Refer to Appe ndix A. “Schematic and Layouts”.

OUT

2C™

, SCL, and SDA are provided through the J1

C test points, the user can examine the data

bus line and observe the resulting analog output (at

MCP4728 Evaluation Board User’s Guide

FIGURE 1-1: Front View of the MCP4728 Evaluation Board.

TABLE 1-1: TEST TERMINALS ON THE MCP4728 EVALUATION BOARD

Test

Terminals

A DAC channel A output

OUT

B DAC channel B output

OUT

C DAC channel C output

OUT

D DAC channel D output

OUT

SCL This terminal is connected to the I

SDA This terminal is connected to the I

RDY/BUSY

LDAC

This terminal is used to monitor the RDY/BUSY pin of the MCP4728 device.

Access terminal to the LDAC pin of the MCP4728.

S1 Switch to change the logic input to the LDAC

JP1 Jumper to select the V

connected, the V

from the J1 connector is connected. If disconnected, it

selects the V

JP2 Jumper to connect the LDAC pin to VSS. (You can disconnect this jumper

VDD1 V

If the V

is provided from J1 connector (PICkit Serial Analyzer), then this

test point monitors the V

GND Connected to common ground plane of the PC Board.

Note 1: This terminal is used to monitor the SCL or SDA signals. You can also provide the

SCL or SDA signals through these pins.

Description

C SCL pin of the MCP4728.

(See Note 1).

C SDA pin of the MCP4728.

(See Note 1).

input pin. It provides logic “low”

when pressed.

source to the MCP4728 Evaluation Board. If it is

source from VDD1 terminal.

when S1 is used.)

monitoring or connection pin.

voltage. You can also connect a new VDD to this

test terminal.

Quick Start Instructions

1.3 GETTING STARTED WITH PICKIT SERIAL ANALYZER

Figure 1-1 shows the MCP4728 Evaluation Board, and Figure 1-2 shows the connection of the MCP4728 Evaluation Board and PICkit Serial Analyzer.

The following steps describe how to use them together:

1. Connect the MCP4728 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 terminals (optional).

3. Connect a multimeter to one of the DAC’s output test terminal.

4. V

• I

• A2, A1, A0 Address Bits: Pre-programmed to‘000’.

5. Connecting V

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

Selection: Y ou 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 of MCP4728: ‘1100’

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.

: LED D1 turns on when VDD is applied. The PICkit Serial

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

LED D1 turns on.

C write and read commands.

MCP4728 Evaluation Board User’s Guide

MCP4728 Evaluation Board

Personal

Computer

Connected between the

PICkit Serial Analyzer

and Personal Computer

DAC Output (Channel B)

PICkit Serial Analyzer

USB Cable

FIGURE 1-2: MCP4728 Evaluation Board with the PICkit Serial Analyzer.

Quick Start Instructions

1.3.1 PICkit Serial Analyzer PC Software Setup for the MCP4728

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. Click the

Next button and follow the instructions.

FIGURE 1-3: PICkit Serial Analyzer Configuration Wizard Welcome Window.

4. Select the Communication Mode type: I

C Master, and click the Next button.

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

MCP4728 Evaluation Board User’s Guide

5. Select 100 kHz or 400 kHz. Either one will be fine. Click the Next button.

FIGURE 1-5: Step 2 - I2C Communication Speed Selection.

Note: The MCP4728 device supports the I2C bus data rate up to 3.4 MHz, but the

current version of the PICkit Serial Analyzer supports the I

C bus data rate

up to 400 kHz only.

6. Select No on Enable Pull-ups and click the Next button.

Note: The MCP4728 Evaluation Board has its own pull-up resistors.

FIGURE 1-6: Step 3 - Device Pull-Ups Window.

Quick Start Instructions

7. Select the VDD voltage of the MCP4728 Evaluation Board and click the Next

button.

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

If you choose PICkit Serial will power your device and 5 V olt s as shown below, the MCP4728 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 MCP4728 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.

FIGURE 1-7: Step 4 - Voltage Source Selection Window.

MCP4728 Evaluation Board User’s Guide

8. Click the OK button. You have made all of the PICkit Serial Analyzer Configuration Setups. You are now ready to read/write MCP4728 registers and EEPROM.

FIGURE 1-8: Configuration Wizard - Finishing Step.

Quick Start Instructions

1.3.2 Creating Script Files:

A script file that is running on the PICkit Serial PC GUI is needed for the communications between the PICkit Serial Analyzer and the MCP4728 Evaluation Board. The following steps show how to create script files and h ow to use them. Refer to the PICkit Serial Analyzer User’s Guide (DS51647) for creating the Script file.

•Select Communication -----> Script ---> Script Builder

FIGURE 1-9: Creating a Script File with Script Builder.

MCP4728 Evaluation Board User’s Guide

1. To change value:

• Click this box and type a new value

2. To delete or Insert box:

• Select 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.

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 clicking with the right mouse button.

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. An option box will appear 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 the next examples.

Note: The following examples need knowledge on the MCP4728 Registers an d

Command protocols. Please refer to the Appendix C. “MCP4728 Read/Write Commands” and the MCP4728 Data Sheet for more details.

1.3.2.2 EXAMPLE 1: SELECTING VOLTAGE REFERENCE OF EACH DAC

CHANNEL

You can select the voltage reference of each channel individually. The choices are: external (V

) or internal reference voltage (V

example of writing a script file on the PICkit Serial PC GUI.

C Scripts” column.

= 2.048V). Figure 1-10 shows an

REF

FIGURE 1-10: Creating a new Script file to select V external V

REF

=VDD) is selected for all DAC channels.

REF

of each DAC channel. In this example,

REF

Quick Start Instructions

Script Detail I2CSTART *

I2CWRTBYT *

02 --------> This means there are two bytes to send. C0 --------> Address byte = 1100-0000 (See Note). 80 --------> 1’st byte (000-0000) selecting external V

REF

I2CSTOP *

• Modify the parameters in the Script Detail column as below:

Note: All 6 parameters above must be listed in order. The parameters with * are

not modifiable. The MCP4728 device on the evaluation board has I

address bits (A2, A1, A0) = (0,0,0).

1.3.2.3 SAVE THE SCRIPT FILE AND PROGRAMMING THE MCP4728 DAC

REGISTERS

1. Type in a script file name (i.e., MCP4728_W_VrfSel) in the space below the

Script Name menu.

2. Click Save Script button.

3. Click Execute Script button.

Note: At this point, the PICkit Serial Analyzer transmits the I2C Write Command

to the MCP4728 device. The saved file name will appear in the Users I2C Scripts column, and can be re-used any time by selecting the file name.

4. You can also see the SCL and SDA waveforms using an 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 und er the “Script Detail” column including

the I

C address of the device, and try again until the “Busy” LED turns OFF

immediately after sending the I

C command.

MCP4728 Evaluation Board User’s Guide

1. To change value:

• Click this box and type a new value

2. To delete or Insert box:

• Select 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.

Script Detail I2CSTART *

I2CWRTBYT *

02 -----> This means there are two bytes to send. C0 -----> Address byte = 1100-0000 (See Note). C0 ---- > Selecting the gain of each channel

I2CSTOP *

(0: Gain of 1, 1: gain of 2)

1.3.2.4 EXAMPLE 2: SELECTING GAIN OF EACH DAC CHANNEL Y ou can select the Gain of each channel individually. Figure 1-11 shows an example of

writing a new script file on the PICkit Serial PC GUI for selecting the gain option. In this example, Gain of 1 is selected.

FIGURE 1-11: Writing Script file to select V selected for all DAC channels.

• Parameters in the Script Detail column:

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

are not modifiable. The MCP4728 device on the evaluation board has I address bits (A2, A1, A0) = (0,0,0).

of each DAC channel. In this example, Gain of 1 is

REF

Quick Start Instructions

1.3.2.5 SAVE THE SCRIPT FILE AND PROGRAMMING THE MCP4728 DAC REGISTERS

1. Type in any scrip t name (i.e., MCP4728_W_GainSl) in the space below the

Script Name menu.

2. Click Save Script button.

3. Click Execute Script button.

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

MCP4728 device. The saved file name will appear in Users I2C Scripts column, and can be re-used any time by selecting the file name.

4. 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 “Scr ipt Detail” column including the I2C address of the device, and try again until the “Busy” LED turns OFF immediately after sending the I

C command.

C Write Command to the

MCP4728 Evaluation Board User’s Guide

1. To change value:

• Click this box and type a new value

2. To delete or Insert box:

• Select 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.

1.3.2.6 EXAMPLE 3: WRITING DAC REGISTERS WITH A FAST WRITE COMMAND

Note: Please refer to the MCP4728 data sheet for the Fast Write Command

structure before excising this example.

Figure 1-12 shows an example of writing a script file on PICkit Serial PC GUI for a Fast Write Command. This command writes to the DAC input registers and power-down selection bits. The data are sent sequentially from channel A to the channel D. EEPROM is not affected. This device updates the DAC output registers (V LDAC

pin is low.

OUT

) when

FIGURE 1-12: Writing Script File to Write Each DAC Register with a Fast Write Command Using the PICkit Serial Analyzer.

Quick Start Instructions

Script Detail I2CSTART *

I2CWRTBYT *

09 -------> This means there are nine bytes to send. C0 -------> Address byte = 1100-0000 (See Note). 0F -------> 1st byte of DAC A Register (Channel A) = 0000-1111 FF -------> 2nd byte of DAC A Register (Channel A) = 1111-1111 07 -------> 1st byte of DAC B Register (Channel B) = 0000-0111

FF -------> 2nd byte of DAC B Register (Channel B) =1111-1111 03 -------> 1st byte of DAC C Register (Channel C) = 0000-0011 FF -------> 2nd byte of DAC C Register (Channel C) = 1111-1111

01 -------> 1st byte of DAC D Register (Channel D) = 0000 -0001 FF -------> 2nd byte of DAC D Register (Channel D) = 1111-1111

I2CSTOP *

• Parameters in the Script Detail column:

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

are not modifiable. The MCP4728 device on the evaluation board has I

address bits (A2, A1, A0) = (0,0,0).

1.3.2.7 SAVE THE SCRIPT FILE AND PROGRAMMING THE MCP4728 DAC REGISTERS

1. Type in any script name (i.e., MCP4728_W_Fast) in the sp ace below the Script

Name menu.

2. Click Save Script button.

3. Click Execute Script button.

Note: At this point, the PICkit Serial transmits the I2C Write Command to the

MCP4728 device. The saved file name will appear in Users I2C Scripts column, and can be re-used any time by selecting the file name.

4. 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 und er the “Script Detail” column including

the I

C address of the device, and try again until the “Busy” LED turns OFF

immediately after sending the I

C command.

5. Read the V

voltage at the V

OUT

In order to update the DAC output register, the LDAC pin must be “Low”.

• Press “S1” button in the MCP4728 Evaluation Board.

The device will update the V

as soon as the LDAC pin switch S1 is pressed.

OUT

You can now measure the DAC output voltages (V using a voltmeter. When Examples 1, 2, and 3 ar e executed seq uenti ally, all channels use an internal reference. Figure 1-13 shows the expectation of each DAC channel outputs.

test pads:

OUT

A, V

OUT

B, V

OUT

C, V

OUT

MCP4728 Evaluation Board User’s Guide

OUT

REFDn

()

4096

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

OUT

4095

()

4096

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

4096 1–

4096

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

⎝⎠

⎛⎞

4096

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

–

⎝⎠

⎛⎞

LSB–====

Next DAC Channels

Fast Mode Write Command

In Script file, Dn for Channel A = 0FFF (hex) = 4095 (decimal)

(A) Channel A Output:

(B) Channel B Output:

In Script file, Dn for Channel B = 07FF (hex) = 2047 (decimal)

OUT

VDD2047

()

4096

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

2048 1–

4096

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

⎝⎠

⎛⎞

---------- -

4096

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

–

⎝⎠

⎛⎞

---------- -LSB–====

In Script file, Dn for Channel C = 03FF (hex) = 1023 (decimal)

OUT

1023

4096

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

1024 1–

4096

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

⎝⎠

⎛⎞

---------- -

4096

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

–

⎝⎠

⎛⎞

---------- -LSB–====

(D) Channel D Output:

In Script file, Dn for Channel D = 01FF (hex) = 511 (decimal)

OUT

511

4096

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

512 1–

4096

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

⎝⎠

⎛⎞

---------- -

4096

----------- -–

⎝⎠

⎛⎞

---------- -LSB–====

DAC Input Data of Channel A = 001111-11111111

DAC A

DAC Input Data of Channel B = 000111-11111111 DAC Input Data of Channel C = 000011-11111111 DAC Input Data of Channel D = 000001-11111111

The following example shows when the device receives the Fast Write command

with the following data:

Start

Stop

1 1 0 0 0 0 0 0 A 0 0 0 0 D11 D10 D9 D8 A D7 D6 D5 D4 D3 D2 D1 D0 A

Address Byte

2nd Byte

3rd Byte1st Byte

FIGURE 1-13: V Gain = 1 for All Channels.

for Example 3: Fast Write Command for Various V

OUT

. V

OUT

= VDD and

REF

Quick Start Instructions

1. To change value:

• Click this box and type a new value

2. To delete or Insert box:

• Select 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.

1.3.2.8 EXAMPLE 4: MULTI-WRITE COMMAND FOR DAC INPUT REGISTERS This command writes to the multiple DAC input registers, one regi ste r at a tim e. The

writing channel register is defined by the DAC selection bits (DAC1, DAC0). EEPROM is not affected by this command.

Figure 1-14 shows an example of creating the PICkit Script file. In this example, the the PICkit Serial Analyzer sends a write command to the DAC input registers A and B.

FIGURE 1-14: Writing Script file to Write Channel A for FFFh and Channel B for 800h Using a Multi-write Command.

MCP4728 Evaluation Board User’s Guide

Script Detail

I2CSTART * I2CWRTBYT *

07 -------> This means there are seven bytes to send.

C0 -------> Address byte = 1100-0000 (See Note). 40 -------> Command Type and Selecting Channel A DAC 0F -------> Configuration register bits and data nibble

FF -------> Data byte

02 -------> Selecting Channel B DAC 08 -------> Configuration register bits and data nibble

00 -------> Data byte

I2CSTOP *

• Parameters in the Script Detail column:

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

are not modifiable. The MCP4728 device on the evaluation board has I address bits (A2, A1, A0) = (0,0,0).

1.3.2.9 SAVE THE SCRIPT FILE AND PROGRAMMING THE MCP4728 DAC REGISTERS

1. Type in any script name (i.e., MCP4728_W_MDAC) in the space below the

Script Name menu.

2. Click Save Script button.

3. Click Execute Script button.

Note: At this point, the PICkit Serial transmits the I2C Write Command to the

MCP4728 device. The saved file name will appear in Users I2C Scripts column, and can be re-used any time by selecting the file name.

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

Note: When you click on the “Execute Script” menu, the “Busy” LED o n 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 und er the “Script Detail” column including

the I

C address of the device, and try again until the “Busy” LED turns OFF

immediately after sending the I

C command.

5. Read the V

voltage at the V

OUT

Since the UDAC bit is set to “0” in the command, the device will update the V V

B as soon as the command is executed regardless of the condition of the LDAC

OUT

pin switch S1.

test pins:

OUT

A and

Quick Start Instructions

OUT

REFDn

()

4096

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

Where:

REF

=VDD if external VREF is selected = 2.048V if internal V

REF is selected.

= Input code

LSB = V

REF/4096

OUT

4095

()

4096

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

4096 1–

4096

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

⎝⎠

⎛⎞

4096

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

–

⎝⎠

⎛⎞

LSB–====

In Script file, Dn for Channel A = 0FFF (hex) = 4095 (decimal)

(A) Channel A Output:

Note that Dn and Gain (Gx) must be selected with the following conditions:

OUT

REFDn

()

4096

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

≤

(B) Channel B Output:

In Script file, Dn for Channel B = 0800 (hex) = 2048 (decimal)

OUT

2048

()

4096

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

---------- -==

No change. The device maintains its output with previous settings.

(D) Channel D Output:

No change. The device maintains its output with previous settings.

Figure 1-15: V and Gain = 1.

for Example 4: Multi-Write Command for Channels A and B with V

OUT

= VDD

REF

MCP4728 Evaluation Board User’s Guide

1. To change value:

• Click this box and type a new value

2. To delete or Insert box:

• Select 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.

Script Detail

I2CSTART * I2CWRTBYT *

04 -------> This means there are four bytes to send. C0 -------> Address byte = 1100-0000 (See Note).

58 -------> Command Type and selection of Channel A. 0F -------> Configuration register bits and data nibble for Channel A.

FF -------> Data byte for Channel A (register and its EEPROM).

I2CSTOP *

1.3.2.10 EXAMPLE 5: SINGLE WRITE COMMAND FOR DAC INPUT REGISTER AND EEPROM

This command writes to a single DAC input register and its EEPROM. Both input register and EEPROM are written at the acknowledge pulse of the input dat a byte. The EEPROM program activity can be monitored through the RDY/BSY MCP4728 data sheet for details.

Figure 1-16 shows an example of writing a script file. In this example, the PICkit Serial Analyzer sends a single write command to the MCP4728 for the DAC A (Channel A) input register.

bit and pin. See the

FIGURE 1-16: Writing Script File to Write the Channel A Register and its EEPROM with FFFh Using a Single Write Command. The Channel A output is updated immediately with the ACK Pulse. This example uses UDAC

Bit, instead of using LDAC pin, to update the DAC output.

• Parameters in the Script Detail column:

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

are not modifiable. The MCP4728 device on the evaluation board has I address bits (A2, A1, A0) = (0,0,0).

Quick Start Instructions

1.3.2.11 SAVE THE SCRIPT FILE AND PROGRAMMING THE MCP4728 DAC REGISTERS

1. Type in any script name (i.e., MCP4728_W_SingEE) in the space below the

Script Name menu.

2. Click Save Script button.

3. Click Execute Script button.

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

MCP4728 device. The saved file name will appear in Users I2C Scripts column, and can be re-used any time by selecting the file name.

4. 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 und er the “Script Detail” column including the I2C address of the device, and try again until the “Busy” LED turns OFF immediately after sending the I

C command.

C Write Command to the

5. Read the V

Since the UDAC (V

A) output as soon as the command is executed regardless of the condition of the

OUT

LDAC

pin switch S1.

voltage at the V

OUT

test pins:

OUT

bit is set to “0” in the command, the device will update the channel A

MCP4728 Evaluation Board User’s Guide

OUT

REFDn

()

4096

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

Where:

REF

=VDD if external V

REF

is selected

= 2.048V if internal V

REF

is selected.

= Input code

LSB = V

REF

/4096

OUT

4095

()

4096

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

4096 1–

4096

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

⎝⎠

⎛⎞

4096

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

–

⎝⎠

⎛⎞

LSB–====

In Script file, Dn for Channel A = 0FFF (hex) = 4095 (decimal)

(A) Channel A Output:

Note that Dn and Gain (Gx) must be selected with the following conditions:

OUT

REFDn

()

4096

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

≤

(B) Channel B Output:

No change. Keep its output with previous settings.

(D) Channel D Output:

No change. Keep its output with previous settings.

FIGURE 1-17: V

for Example 5: Single Write Command for Channel A: V

OUT

= VDD and Gain = 1.

REF

Quick Start Instructions

1. To change value:

• Click this box and type a new value

2. To delete or Insert box:

• Select 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.

1.3.2.12 EXAMPLE 6: SEQUENTIAL WRITE FOR DAC INPUT REGISTERS AND EEPROM

This command writes to the DAC input registers and EEPROM sequentially from a start channel to the channel D. The input register is writte n at the ACK pulse of the input data byte of each register. However, the EEPROM are written altogether at the same time sequentially at the end of the last byte. The EEPROM writing activity can be monitored through the RDY/BSY

Figure 1-18 shows an example of writing a script file on PICkit Serial PC GUI for this command.

bit and pin. See the MCP4728 data sheet for details.

FIGURE 1-18: Writing Script file to write the Channel B to Channel D. This command writes to both the input registers and EEPROM: (a) Channel B Settings: V Settings: V

= Internal (2.048V), Gain = 1. (c) Channel D Settings: V

REF

The DAC outputs are updated imm ediately with th e ACK pulse. This example uses the U

= VDD and Gain = 1. (b) Channel C

REF

= Internal (2.048V), Gain = 2.

REF

DAC bit to update

the DAC outputs.

MCP4728 Evaluation Board User’s Guide

Script Detail

I2CSTART * I2CWRTBYT *

08 -------> This means there are eight bytes to send. C0 -------> Address byte = 1100-0000 (See Note).

52 -------> Command Type and Ch. B is a starting channel 0F -------> Configuration register bits and data nibble for Ch. B

FF -------> Data byte for Ch. B

FF -------> Data byte for Ch. C 90 -------> Configuration register bits and data nibble for Ch. D

I2CSTOP *

FF -------> Data byte for Ch. D

8F -------> Configuration register bits and data nibble for Ch. C

• Parameters in the Script Detail column:

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

are not modifiable. The MCP4728 device on the evaluation board has I

address bits (A2, A1, A0) = (0,0,0).

1.3.2.13 SAVE THE SCRIPT FILE AND PROGRAMMING THE MCP4728 DAC REGISTERS

1. Type in an y script name (i.e., MCP4728_W_SeqB) in the sp ace below the Script

Name menu.

2. Click Save Script button.

3. Click Execute Script button.

Note: At this point, the PICkit Serial transmits the I2C Write Command to the

MCP4728 device. The saved file name will appear in Users I2C Scripts column, and can be re-used any time by selecting the file name.

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

Note: When you click on the “Execute Script” menu, the “Busy” LED o n 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 und er the “Script Detail” column including

the I

C address of the device, and try again until the “Busy” LED turns OFF

immediately after sending the I

C command.

5. Read the V

voltage at the V

OUT

Since the UDAC bit is set to “0” in the command, the device will update the V and D outputs as soon as the command is ex ecuted rega rdless of the co ndition of the LDAC

pin switch S1.

test terminals:

OUT

B, C,

OUT

REFDn

()

4096

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

Where:

REF

=VDD if external V

REF

is selected

= 2.048V if internal V

REF

is selected.

= Input code

LSB = V

REF

/4096

OUT

4095

()

4096

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

xVDD

4096 1–

4096

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

⎝⎠

⎛⎞

4096

----------- -–

⎝⎠

⎛⎞

LSB–====

In Script file, V

REF

= VDD, Gain (GX) = 1, Dn for Channel B = 0FFF (hex) = 4095 (decimal)

(A) DAC A Output:

Note that Dn and Gain (Gx) must be selected with the following conditions:

OUT

REFDn

()

4096

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

≤

(B) DAC B Output:

(D) DAC D Output:

No change. Keep its output with previous settings.

In Script file, V

REF

= Internal, Gain (GX) = 1, Dn for Channel C = 0FFF (hex) = 4095 (decimal)

OUT

REF

4095

()

4096

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

xVREF

4096 1–

4096

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

⎝⎠

⎛⎞

REF

4096

----------- -–

⎝⎠

⎛⎞

REF

LSB–====

where V

REF

= internal = 2.048V , LSB =0.5mV

In Script file, V

REF

= Internal, Gain = 2, Dn for Channel D = 00FF (hex) = 255 (decimal)

OUT

REF

255

4096

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

xVREF

255

4096

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

⎝⎠

⎛⎞

REF

0.06226()2() 0.255V====

= 2.0475

where V

REF

= internal = 2.048V

Quick Start Instructions

FIGURE 1-19: V

for Example 6: V

OUT

after Sequential Write Command.

OUT

MCP4728 Evaluation Board User’s Guide

18h = 24 (decimal): Requesting 24 bytes.

Read Command

Reading Data

1.3.2.14 EXAMPLE 7: TESTING EEPROM FEATURES

The device will upload the EEPROM data to both input and output DAC registers (a) during power-up sequence or (b) when it receives the General Call Reset command. One of these conditions makes the analog outputs available immediately with their current EEPROM settings. Note that the Power-Down bit must be cleared for the output.

• Testing Procedure:

a. Write to the EEPROM with one of the examples shown earlier (i.e.,

Section 1.3.2.12 “Example 6: Sequential Write for DAC Input Registers and EEPROM”).

b. Measure and record the analog voltage of each channel (V

multimeter.

c. Turn-off the V

Analyzer, disconnect JP1 connect.

d. Turn-back on the V

channel again. Confirm the V

1.3.2.15 EXAMPLE 8: READING DAC REGISTERS AND EEPROM

This example shows how to read back the DAC input registers and EEPROM data. Figure 1-20 shows the PICkit Serial script file to read all DAC input registers and

EEPROM data. Once this file is executed, the PC GUI will show you the contents of the registers and EEPROM.

of the device. If you are using the VDD from the PICkit Serial

again and measure the analog voltage (V

is the same as in Step (b).

OUT

) using a

OUT

) of each

OUT

FIGURE 1-20: Reading the DAC Registers and its EEPROM with a Read Command. See

Figure 1-21 for Details in Reading Data.

Quick Start Instructions

DAC A Register

DAC A EEPROM

DAC B Register

DAC B EEPROM

DAC C EEPROM

DAC C Register

DAC D Register

DAC C EEPROM

Ch. A Register: C0-0F-FF: V

REF

= VDD, GA = x1, Data = FFFh

Ch. A EEPROM: C8-0F-FF: V

REF

= VDD, GA = x1, Data = FFFh

Ch. B Register: D0-0F-FF: V

REF

= VDD, GA = x1, Data = FFFh

Ch. B EEPROM: D8-0F-FF: V

REF

= VDD, GA = x1, Data = FFFh

Ch. C Register: E0-8F-FF: V

REF

= VDD, GA = x1, Data = FFFh

Ch. C EEPROM: E8-0F-FF: V

REF

= VDD, GA = x1, Data = FFFh

Ch. D Register: F0-90-FF: V

REF

= VDD, GA = x2, Data = 0FFh

Ch. D EEPROM: F8-90-FF: V

REF

= VDD, GA = x2, Data = 0FFh

Note: In Figure 1-20, the script file called “MCP4728_Read” was created, saved

and executed.

FIGURE 1-21: The contents of the Registers and EEPROM. The order of the contents: Channel A Register and EEPROM, and Channel B Register and EEPROM, and so on sequentially. See the Read Command and Device Output details in MCP4728 Data Sheet.

MCP4728 Evaluation Board User’s Guide

1. To change value:

• Click this box and type a new value

2. To delete or Insert box:

• Select 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.

Script Detail

I2CSTART * I2CWRTBYT *

03 -------> This means there are three bytes to send. C0 -------> Address byte = 1100-0000 (See Note).

AF -------> Command Type and Power-Down bits for Chs. A and B. FF -------> Power-Down bits for Channels C and D.

I2CSTOP *

1.3.2.16 EXAMPLE 9: WRITE POWER-DOWN SELECTION BITS IN DAC INPUT REGISTER

This command writes power-down bits to the DAC input registers. Figure 1-22 shows an example of writing a new script file for Power-Down mode.

FIGURE 1-22: Writing Scr ipt file to write the power-down bits. The channel outputs are updated immediately with the ACK pulse. This command does not require UDAC

• Parameters in the Script Detail column:

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

are not modifiable. The MCP4728 device on the evaluation board has I address bits (A2, A1, A0) = (0,0,0).

bit or LDAC pin change.

Quick Start Instructions

1.3.2.17 SAVE THE SCRIPT FILE AND PROGRAMMING THE MCP4728 DAC REGISTERS

1. Type in any script name (i.e., MCP4728_W_PDown) in the space below the

Script Name menu.

2. Click Save Script button.

3. Click Execute Script button.

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

MCP4728 device. The saved file name will appear in Users I2C Scripts column, and can be re-used any time by selecting the file name.

4. 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 re-check the parameter values including the order of parameters und er the “Script Detail” column including

the I

C address of the device, and try again until the “Busy” LED turns OFF

immediately after sending the I

C command.

C Write Command to the

5. Read the V

voltage at the V

OUT

test pins:

OUT

Once this command is executed, all analog voltage outputs (V the analog output pins (V

) are internally connected with about 500 kΩ.

OUT

) will be “zero”, and

OUT

MCP4728 Evaluation Board User’s Guide

NOTES:

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

This appendix contains the following schematics and layouts for the MCP4728 Evaluation Board:

• Board – Schematic

• Board – Top Silk, Top Pads, and Top Copper Layer

• Board – Top Copper and Pads Layer

• Board – Top Pads and Silk Layer

• Board – Bottom Copper Layer

MCP4728 EVALUATION BOARD

USER ’S GUIDE

MCP4728 Evaluation Board User’s Guide

A.2 BOARD – SCHEMATIC

Schematic and Layouts

A.3 BOARD – TOP SILK, TOP PADS AND TOP COPPER

MCP4728 Evaluation Board User’s Guide

A.4 BOARD – TOP COPPER AND PADS

A.5 BOARD – TOP PADS AND SILK

Schematic and Layouts

MCP4728 Evaluation Board User’s Guide

A.6 BOARD – BOTTOM COPPER LAYER

MCP4728 EVALUATION BOARD

USER ’S GUIDE

Appendix B. Bill Of Materials (BOM)

TABLE B-1: BILL OF MATERIALS

Qty Reference Description Manufacturer Part Number

4 C1, C3, C4, C5 CAP 1000PF 50V CERAMIC X7R

0603

1 C2 CAP CERAMIC 10UF 6.3V X5R

0603 1 D1 LED RED CLEAR 0805 SMD Lite-On Inc LTST-C170CKT 1 J1 CONN HEADER 6POS .100 R/A

TIN 2 JP1, JP2 CONN HEADER 2POS .100 VERT

TIN 1 PCB RoHS Compliant Bare PCB,

MCP4728 Evaluation board 4 R1, R2, R4, R5 RES 4.99K OHM 1/10W 1% 0603

SMD 1 R3 RES 470 OHM 1/8W 5% 0805 SMD Panasonic - ECG ERJ-6GEYJ471V 13 RDY/~BSY,

SCL, SDA, VDDA, VOUTA, VOUTB, VOUTC, VOUTD, LDAC, GND

1 S1 SWITCH LIGHT TOUCH 160GF

1 U1 Microchip Technology Inc. MCP4728-E/UN

TEST POINT PC COMPACT SMT Keystone Electronics

SMD

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.

Panasonic® - ECG ECJ-1VB1H102K

Panasonic - ECG ECJ-1VB0J106M

Molex

/Waldom® Electron-

ics Corp Molex/Waldom Electronics

Corp Microchip Technology Inc. 104-00229

Panasonic - ECG ERJ-3EKF4991V

Panasonic - ECG EVQ-PPBA25

22-05-2061

22-03-2021

5016

MCP4728 Evaluation Board User’s Guide

NOTES:

MCP4728 EVALUATION BOARD

USER ’S GUIDE

Appendix C. MCP4728 Read/Write Commands

C.1 INTRODUCTION

Table summarizes the write comma nd type s an d th eir fun ctio ns . Th e writ e com m a nd is defined by using three write command type bits (C2, C1, C0) and two write function bits (W1, W0). Writing and reading the I PICKit Serial Analyzer. Plea se see the MCP4728 data sheet for more details on th e commands.

TABLE C-1: WRITE COMMAND TYPES

Command Field

C2 C1 C0 W1 W0

Fast Mode Write

0 0 X Not Used Fast Write for DAC

Write DAC Input Register and EEPROM

01000Multi-Write for DAC

Write I2C Address Bits (A2, A1, A0)

0 1 1 Not Used Write I2C Address

Note 1: The analog output is upd ated when LDAC pin is (or changes to) “Low”. UDAC bit is not used for this

command.

2: The DAC output is updated when LDAC 3: The device starts writing to the EEPROM on the acknowledge clock pulse of the last channel. The device

does not execute any command until RDY/BSY

4: The input and output registers are updated at the acknowledge clock pulse of the last byte. The update

does not require LDAC

Write

Function

1 0 Sequential Write for

1 1 Single Write for

Command Name Function

Input Registers

DAC Input Registers and EEPROM

DAC Input Register

and EEPROM

Bits

pin or UDAC bit conditions. EEPROM is not affected.

This command writes to the DAC input registers sequentially with limited configuration bits. The data is sent sequentially from channels A to D. The input registe r is written at the acknowledge clock pulse of the channel’s last input data byte. EEPROM is not affected. (Note 1)

This command writes to multiple DAC input registers, one DAC input register at a time. The writing channel register is defined by the DAC selection bits (DAC1, DAC0). EEPROM is not affected. (Note 2)

This command writes to both the DAC input registers and EEPROM sequentially. The sequential writing is carried out from a starting channel to channel D. The starting channel is defined by the DAC selection bits (DAC1 and DAC0). The input register is written at the acknowledge clock pulse of the last input data byte of each register. However, the EEPROM data is written altogether at the same time sequentially at the end of the last byte. (Note 2),(Note 3)

This command writes to a single selected DAC input register and its EEPROM. Both the input register and EEPROM are written at the acknowledge clock pulse of the last input data byte. The writing channel is defined by the DAC selection bits (DAC1 and DAC0). (Note 2),(Note 3)

This command writes new I2C address bits (A2, A1, A0) to the DAC input register and EEPROM.

pin or UDAC bit is “Low”.

C address bits are not demonstrated with the

bit comes back to “High”.

MCP4728 Evaluation Board User’s Guide

TABLE C-1: WRITE COMMAND TYPES (CONTINUED)

Command Field

C2 C1 C0 W1 W0

Write V

1 0 0 Not Used Write Reference

1 1 0 Not Used Write Gain selec-

1 0 1 Not Used Write Power-Down

Note 1: The analog output is upd ated when LDAC

, Gain, and Power-Down Select Bits (Note 4)

REF

command.

2: The DAC output is updated when LDAC 3: The device starts writing to the EEPROM on the acknowledge clock pulse of the last channel. The device

does not execute any command until RDY/BSY

4: The input and output registers are updated at the acknowledge clock pulse of the last byte. The update

does not require LDAC

Write

Function

Command Name Function

This command writes reference (V

) selection

REF

bits to Input Regis-

ters

tion bit to Input

Registers

bits to Input Regis-

ters

pin or UDAC bit conditions. EEPROM is not affected.

channel.

This command writes Gain selection bits of each channel.

This command writes Power-Down bits of each channel.

pin is (or changes to) “Low”. UDAC bit is not used for this

pin or UDAC bit is “Low”.

bit comes back to “High”.

) selection bits of each

REF

NOTES:

MCP4728 Read/Write Commands

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

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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: 886-3-6578-300 Fax: 886-3-6578-370

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

03/26/09

Microchip Technology MCP4728 User’s Guide

Specifications and Main Features

Frequently Asked Questions

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 MCP4728 EVALUATION BOARD

1.3 GETTING STARTED WITH PICKIT SERIAL ANALYZER

Appendix A. Schematic and Layouts

A.1 INTRODUCTION

A.2 BOARD – SCHEMATIC

A.3 BOARD – TOP SILK, TOP PADS AND TOP COPPER

A.4 BOARD – TOP COPPER AND PADS

A.5 BOARD – TOP PADS AND SILK

A.6 BOARD – BOTTOM COPPER LAYER

Appendix B. Bill Of Materials (BOM)

Appendix C. MCP4728 Read/Write Commands

C.1 INTRODUCTION

WORLDWIDE SALES AND SERVICE