Texas Instruments ADS5102 EVM Manuale utente

ADS5102/3 EVM

December 2001 AAP High-Speed Data Converter (Dallas)

User’s Guide

SLAU077

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,

enhancements, improvements, and other changes to its products and services at any time and to discontinue

any product or service without notice. Customers should obtain the latest relevant information before placing

ordersandshouldverifythatsuchinformationiscurrentandcomplete.AllproductsaresoldsubjecttoTI’sterms

and conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale in

accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI

deems necessary to support this warranty. Except where mandated by government requirements, testing of all

parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for

their products and applications using TI components. To minimize the risks associated with customer products

and applications, customers should provide adequate design and operating safeguards.

TIdoesnotwarrantorrepresentthatanylicense, eitherexpress orimplied, isgranted underanyTIpatent right,

inwhichTIproductsorservicesareused.InformationpublishedbyTIregardingthird–partyproductsorservices

does not constitute a license from TI to use such products or services or a warranty or endorsement thereof.

Use of such information may require a license from a third party under the patents or other intellectual property

of the third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of information in TI data books or data sheets is permissible only if reproduction is without

alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction

of this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable for

such altered documentation.

Resale of TI products or services with statements different from or beyond the parameters stated by TI for that

product or service voids all express and any implied warranties for the associated TI product or service and

is an unfair and deceptive business practice. TI is not responsible or liable for any such statements.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

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 PURPOSES ONLY and is not considered by TI to

befitforcommercialuse.Assuch,thegoodsbeingprovidedmaynotbecompleteinterms

of required design-, marketing-, and/or manufacturing-related protective considerations,

including product safety measures typically found in the end product incorporating the

goods. As a prototype, this product does not fall within the scope of the European Union

directive on electromagnetic compatibility and therefore may not meet the technical

requirements of the directive.

Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide,

the kit may be returned within 30 days from the date of delivery for a full refund. THE

FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO

BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR

STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS

FOR ANY PARTICULAR PURPOSE.

Theuserassumesallresponsibilityandliabilityforproperandsafehandlingofthegoods.

Further, the user indemnifies TI from all claims arising from the handling or use of the

goods. Please be aware that the products received may not be regulatory compliant or

agency certified (FCC, UL, CE, etc.). Due to the open construction of the product, it is

the user’s responsibility to take any and all appropriate precautions with regard to

electrostatic discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER

PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL,

INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TIcurrentlydealswithavarietyofcustomersforproducts,andthereforeourarrangement

with the user is not exclusive.

TI assumes no liability for applications assistance, customer product design,

software performance, or infringement of patents or services described herein.

Pleasereadthe EVMUser’s Guideand,specifically, the EVMWarnings and Restrictions

notice in the EVM User’s Guide prior to handling the product. This notice contains

important safety information about temperatures and voltages. For further safety

concerns, please contact the TI application engineer.

Personshandlingtheproductmusthaveelectronicstrainingandobservegoodlaboratory

practice standards.

No license is granted under any patent right or other intellectual property right of TI

covering or relating to any machine, process, or combination in which such TI products

or services might be or are used.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the specified input and output ranges as described

in the EVM user’s guide.

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.

Applyingloadsoutsideofthespecifiedoutputrangemayresultinunintendedoperationand/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.

Duringnormaloperation,somecircuitcomponentsmayhavecasetemperaturesgreaterthan

60°C.TheEVM isdesignedto operateproperlywith certain componentsabove 60°C aslong

astheinputandoutput rangesare maintained.Thesecomponentsincludebut arenot limited

tolinearregulators,switchingtransistors,passtransistors,andcurrentsenseresistors.These

typesof devicescanbeidentifiedusingtheEVM schematiclocated intheEVMUser’sGuide.

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

that these devices may be very warm to the touch.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

Information About Cautions and Warnings

Preface

Read This First

About This Manual

This user’s guide is to assist the user with the operation of the EVM using the

ADS5102/3 devices.

How to Use This Manual

This document contains the following chapters:

-Chapter 1—Overview

-Chapter 2—Physical Description

-Chapter 3—Circuit Description

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.

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

Please read each caution and warning carefully.

Contents

FCC Warning

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

generates, uses, and can radiate radio frequency energy and has not been

testedforcompliancewiththelimitsofcomputingdevicespursuanttosubpart

Jofpart15ofFCCrules,which aredesignedtoprovidereasonableprotection

against radio frequency interference. Operation of this equipment in other

environments 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.

Contents

vii

Contents

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

1.1 Purpose 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 EVM Basic Functions 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Power Requirements 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 ADS5102/3 EVM Operational Procedure 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Physical Description 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 PCB Layout 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Bill of Materials 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Circuit Description 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Circuit Function 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.1 Analog Inputs 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.2 External Reference Inputs 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.3 Clock Inputs 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.4 Control Inputs 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.5 Power 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1.6 Outputs 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Schematic Diagram 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures

2–1 Top Layer 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Inner Layer 1, Ground Plane 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Inner Layer 2, Power Plane 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–4 Bottom Layer 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

viii

Tables

1–1 Two Pin Jumper List 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–2 Three Pin Jumper List 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1 Bill of Materials 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1 Reference Voltage Adjustment Ranges 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3–2 Output Connector J15 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Notes, Cautions, and Warnings

Voltage Limits 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Overview

This user’s guide gives a general overview of the ADS5102/3 evaluation

module (EVM) and provides a general description of the features and

functions to be considered while using this module.

Topic Page

1.1 Purpose 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 EVM Basic Functions 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Power Requirements 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 ADS5102/3 EVM Operational Procedure 1-3. . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

Purpose

1-2

1.1 Purpose

The ADS5102/3 EVM provides a platform for evaluating the ADS5102/3

analog-to-digital converter (ADC) under various signal, reference, and supply

conditions. Use this document in combination with the EVM schematic

diagram supplied.

1.2 EVM Basic Functions

Analog input to the ADC is provided via two external SMA connectors. The

single-ended input the user provides is converted into a differential signal at

the input of the device. One input uses a differential amplifier, while the other

input is transformer coupled.

TheEVMprovidesanexternalSMAconnectionforinputoftheADCclock.The

usercansendthisclocktotheoutputconnectorwiththedigitaldataorprovide

asecondclocksourcetobesentinplaceoftheADCclock.Thisallowstheuser

to provide the required setup and hold times of the output data with respect to

theoutputclock.Seethe Clock Inputssectionfortheproperconfigurationand

operation.

DigitaloutputfromtheEVMisviaa40-pinconnector.Thedigital linesfromthe

ADC are buffered before going to this connector. More information on this

connector can be found in the ADC output section.

PowerconnectionstotheEVMareviabananajacksockets.Separatesockets

are provided for the analog and digital supply.

In addition to the internal reference provided by the ADS5102/3 device,

options are provided on the EVM to allow adjustment of the ADC references

via an onboard reference circuit. A precision voltage reference source, a

resistor network, and an operational amplifier (op amp) provide the

ADS5102/3 device reference voltages REFT and REFB.

1.3 Power Requirements

The EVM can be powered directly with a single 1.8-V supply if using the

module with transformer coupled input, internal reference source, and 1.8-V

logic outputs.

Avoltageof3.3VisrequiredfortheDRVDDpowerinputtoprovide3.3-Vlogic

outputs. A voltage of ±5 V is required if using external references and/or

differential amplifier input. Provision has also been made to allow the EVM to

be powered with independent 1.8-V analog and digital supplies to provide

higher performance.

Voltage Limits

Exceeding the maximum input voltages can damage EVM

components. Undervoltage may cause improper operation of

some or all of the EVM components.

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