MCP4728 datasheet(9/50 Pages) MICROCHIP

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MCP4728 EVALUATION BOARD

USER’S GUIDE

DS51837A-page 5

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 PICkitTM Serial Analyzer. The following sections cover the topics:

• 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 of 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 connector for the PICkit Serial Analyzer, and

I2C test point terminals.The user can evaluate this board by using the PICkit Serial

Analyzer or by providing the I2C serial communication signals through the I2C test

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 pin feature, etc.

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 Analyzer at same time.

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

speed mode (3.4 MHz) of the I2C serial communications. This evaluation board

has 5 k

Ω for the I2C pull-up resistors and supports up to the fast mode. If the user

needs to evaluate the device with high speed mode (3.4 MHz), please replace the

R1 and R2 with lower values (less than 1 k

Ω).

The MCP4728 Evaluation Board has test points for SDL, SDA, and DAC outputs. By

connecting an oscilloscope to these I2C test points, the user can examine the data

communications through the I2C™ bus line and observe the resulting analog output (at

VOUT terminals) using a multimeter. Refer to Appendix A. “Schematic and Layouts”.

Note:

The MCP4728 Evaluation Board can be used without the PICkit Serial

Analyzer as long as the VDD, SCL, and SDA are provided through the J1

connector. This board does not include MCU.

MCP4728 Datasheet(PDF) 9 Page - Microchip Technology

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