Texas Instruments ADS1202EVM Manual de usuario

ADS1202 Modular EVM

August 2003 Data Acquisition - Digital/Analog Converters)

User’s Guide

SLAU111

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EVM IMPORTANT NOTICE

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:

This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION

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Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM

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EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of ±125 mV and the output

voltage range of 0 V to 5 V.

Exceeding the specified input range may cause unexpected operation and/or irreversible

damage to the EVM. If there are questions concerning the input range, please contact a TI

field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or

possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to

connecting any load to the EVM output. If there is uncertainty as to the load specification,

please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than

23°C. The EVM is designed to operate properly with certain components above 50°C as long

as the input and output ranges are maintained. These components include but are not limited

to linear regulators, switching transistors, pass transistors, and current sense resistors. These

types of devices can be identified using the EVM schematic located in the EVM User’s Guide.

When placing measurement probes near these devices during operation, please be aware

that these devices may be very warm to the touch.

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Information About Cautions and Warnings

iii

Preface

Read This First

About This Manual

This users guide describes the characteristics, operation, and use of the

ADS1202 Modular EVM. A complete circuit description as well as schematic

diagram is included.

How to Use This Manual

This document contains the following chapters:

-Chapter 1—EVM Overview

-Chapter 2—Power Supply Options

-Chapter 3—EVM Operation

-Chapter 4—ADS1202 Modular EVM BOM and Schematic

Information About Cautions and Warnings

This book may contain cautions and warnings.

This is an example of a caution statement.

A caution statement describes a situation that could potentially

damage your software or equipment.

This is an example of a warning statement.

A warning statement describes a situation that could potentially

cause harm to you.

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Trademarks

The information in a caution or a warning is provided for your protection.

Please read each caution and warning carefully.

Related Documentation From Texas Instruments

To obtain a copy of any of the following TI documents, call the Texas

Instruments Literature Response Center at (800) 477-8924 or the Product

Information Center (PIC) at (972) 644-5580. When ordering, please identify

this booklet by its title and literature number. Updated documents can also be

obtained through our website at www.ti.com.

Data Sheet: Literature Number:

ADS1202 SBAS275

User’s Guide: Literature Number:

5-6K Interface Board EVM SLAU104

FCC Warning

This equipment is intended for use in a laboratory test environment only. It gen-

erates, uses, and can radiate radio frequency energy and has not been tested

for compliance with the limits of computing devices pursuant to subpart J of

part 15 of FCC rules, which are designed to provide reasonable protection

against radio frequency interference. Operation of this equipment in other en-

vironments may cause interference with radio communications, in which case

the user at his own expense will be required to take whatever measures may

be required to correct this interference.

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TI logo is a trademark of Texas Instruments.

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Contents

1 EVM Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Analog Interface 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Digital Interface 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Power Supply Options 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 EVM Operation 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 ADS1202 Modular EVM BOM and Schematic 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 ADS1202 Modular EVM BOM 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Schematic 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

4-1. Bill of Materials 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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1-1

EVM Overview

The ADS1202 modular EVM provides direct modulator output to a host

processor and allows all operating modes of the ADS1202. It provides various

isolation options for a variety of applications.

The new modular EVM form factor allows for direct evaluation of the ADC’s

performance and operating characteristics. This EVM is compatible with the

5-6K Interface Board (SLAU104) from Texas Instruments.

-Direct modulator output

-Various isolation options

-Direct operation with a variety of DSK platforms from Texas

Instruments

Topic Page

1.1 Analog Interface 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Digital Interface 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

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Analog Interface

1-2

1.1 Analog Interface

The ADS1202 modular EVM is designed for easy interfacing to multiple analog

sources. Samtec part numbers SSW-110-22-F-D-VS-K and

TSM-110-01-T-DV-P provide a convenient 10-pin dual row header/socket

combination at J1. Connector J1 provides access to the ADS1202 input pins.

The modulator + input terminal is connected to pin 2, the - input terminal is

connected to pin 4. Pins 1-19 are connected to analog ground.

1.2 Digital Interface

The ADS1202 modular EVM is designed for easy interfacing to multiple control

platforms. Samtec part numbers SSW-110-22-F-D-VS-K and

TSM-110-01-T-DV-P provide a convenient 10-pin dual row header/socket

combination at J2. This header/socket combination provides access to the

clock and data output pins of the ADS1202 Sigma Delta modulator.

Signal Description

J2.1 Unused

J2.3 SCLK Serial clock input (for use with MODE 3 Operation)

J2.5 CLKR Modulator clock output (for use with MODES 0, 1 and 2)

J2.7 Unused

J2.9 Unused

J2.11 Unused

J2.13 SDO Bit stream data output from ADS1202

J2.15 Unused

J2.17 Unused

J2.19 SPARE

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