Texas Instruments SLAU081 Manuale utente

 

January 2002 AAP Data Acquisition (Dallas)

User’s Guide

SLAU081

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 underanyTIpatentright,

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 EVMWarningsand 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 input voltage range of ±12 V and the output

voltage range of ±12 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.

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 certaincomponentsabove 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

Running Title—Attribute Reference

Chapter Title—Attribute Reference

Contents

1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 EVM Modes 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1.1 Stand-Alone Mode 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1.2 User Mode 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Analog Input Conditioning 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Analog Output Conditioning 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Prototype Area 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Getting Started 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Shipping (Default Configuration) 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Jumpers 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.1 Analog I/O Signal Conditioning 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.2 Channel 0 Analog Input 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.3 Channel 0 Analog Output 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.4 Signal Generator 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.5 Voltage Reference 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.6 ADC Supply Voltage 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.7 Clock/Timer Routing 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Switches 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3.1 Stand-Alone-Mode, SW1-1 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Connectors 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 ADC and DAC Direct Access 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 Host Communication 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6.1 Common Connector 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6.2 Legacy Connector 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A Bill of Materials, Board Layout, and Schematics A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Running Title—Attribute Reference

Figures

2–1 SAM Configuration 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

2–1 Default Switch Settings 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–2 Default Jumper Settings 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–3 Jumper/Function Reference 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1

Introduction

This chapter contains an overview of the features and functions of the EVM.

Topic Page

1.1 EVM Modes 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Analog Input Conditioning 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 Analog Output Conditioning 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 Prototype Area 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

EVM Modes

1-2

This user’s guide has been written to help you get the most from your

evaluation module (EVM). The TLC4541 EVM is a member of the

multipurpose(MP)familyofserialEVMs.Itprovidesaplatformtodemonstrate

the performance and functionality of the TLC4541 ADC and the

TLV5636 DAC.

TI’s websites are regularly updated. They present the latest software

additions, development information, troubleshooting help, general

background, as well as all applicable data sheets.

For specific questions related to this EVM or device send an email to the

Analog Applications Team at [email protected] and reference the

orderable tool description –TLC4541 EVM.

This user’s guide is divided into the following chapters:

-Chapter 1 offers an overview of the EVM and introduces the general

features and functions of the system.

-Chapter2describestheoperationoftheEVMfromauser’sview. Itdetails

options that can be modified, connectors used, and pinout details.

-Appendix A details the bill of materials (BOM) and the schematic, along

with explanations of certain EVM features.

1.1 EVM Modes

This EVM has been designed, tested, and shipped in a condition that enables

the user to begin evaluation with minimal effort.

There are basically two operating modes for the EVM. These modes are

mutually exclusive. They are:

-Stand-Alone Mode (SAM)

Stand-alone mode enables the user to check the system without the

support of a signal generator, pattern generator, or DSP. In this mode, the

digital output from the ADC is fed into the companion DAC and

reconstructed.

User mode is deselected if SAM is selected. The DSP will be unable to

communicate with either the ADC or the DAC.

-User Mode

The EVM typically operates via a DSP or a microprocessor. In this mode

theuserisresponsibleforgeneratingallthecontrolsignals.Ifusermodeis

selected, SAM is deselected.

Analog Input Conditioning

1-3

Introduction

1.1.1 Stand-Alone Mode

A unique feature of this EVM is the facility it offers the user to closely couple

theADCandDACwithaminimumofuserintervention.Thisfeatureallowsthe

serial bit stream from the digitized analog output to be fed directly to the DAC.

Therefore, the signal that is fed into the ADC can be reconstructed via the

DAC. No DSP need be present.

SAM is selected by:

-Switching SW1-1 to the on position, LED is on.

1.1.2 User Mode

The user can connect the ADC to a DSP or to a microprocessor in two ways:

-Via IDC ribbon cable

-Via daughterboard connectors J16 and J17

User mode is selected by:

-Switching SW1-1 to the off position, LED is off.

For example, TI’s range of DSP starter kits (DSK modules) provides a simple

low-cost solution, offering a range of DSK modules for most needs. The EVM

also supports the TMS320C6000 daughtercard specification (SPRA711), in

addition to providing support for the Motorola specification for data

transfer (SPI).

1.2 Analog Input Conditioning

There are a number of methods to connect analog input signals to the EVM.

Chapter 2 discusses these alternatives.

1.3 Analog Output Conditioning

There are a number of methods to connect analog output signals to the EVM.

Chapter 2 discusses these alternatives.

1.4 Prototype Area

An area of the PWB has been set aside if none of the signal conditioning

options provided are suitable.

The prototype area has the following features:

-A matrix of plated-through holes (PTH)

-SMT pads in a standard 14-pin JEDEC footprint

-Convenient points to pick up all power options

2-1

Getting Started

This chapter describes how the user can modify the various options of

this EVM.

Topic Page

2.1 Shipping (Default Configuration) 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Jumpers 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Switches 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Connectors 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 ADC and DAC Direct Access 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 Host Communication 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2

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