Texas Instruments Modular MSOP8 EVM Manuale utente

Modular MSOP8 EVM

June 2009 Data Acquisition

User’s Guide

SLAU115A

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Read This First

Preface

Read This First

About This Manual

This user’s guide describes the characteristics, operation, and use of the

Modular MSOP8 EVM. This EVM is a multi-device, 12 to 16 bit, SSI, analog

to digital converter Evaluation Module. A complete circuit description, as well

as schematic diagram and bill of materials, are included.

How to Use This Manual

This document contains the following chapters:

-Chapter 1—EVM Overview

-Chapter 2—Analog Interface

-Chapter 3—Digital Interface

-Chapter 4—Power Supplies

-Chapter 5—EVM Operation

-Chapter 6—EVM Bill of Materials 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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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, identify this

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

obtained through our website at www.ti.com.

EVM Compatible Device Data Sheets: Literature Number:

ADS7816 SBAS110

ADS7817 SBAS230

ADS7818 SBAS078

ADS7822 SBAS062

ADS7834 SBAS098

ADS7835 SBAS102

ADS8317 SBAS356

ADS8320 SBAS108

ADS8321 SBAS123

ADS8324 SBAS172

ADS8325 SBAS226

ADS8326 SBAS343

Application Notes/Additional Literature: Literature Number:

Op Amps for Everyone SLOD006

5−6K Interface Board SLAU104

Single and Bipolar Supply Signal Conditioning Boards SLAU105

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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Contents

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

1.1 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Introduction 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

3 Digital Interface 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 Power Supplies 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 ADC Power 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 Stand Alone Operation 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.3 Reference Voltage 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 EVM Operation 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Analog Input 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 Digital Control 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Chip Select (Shut Down) 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.4 Digital I/O Buffers 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5 Default Jumper Locations 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 EVM BOM and Schematic 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 EVM Schematic 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

2−1 Analog Interface Pin Out 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−1 Digital Interface Pin Out 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4−1 Power Supply Pin Out 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−1 List of Jumpers 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6−1 Bill of Materials 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Contents

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1-1

EVM Overview

The following section gives a general overview of the Modular MSOP8

evaluation board.

Topic Page

1.1 Features 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Introduction 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

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Features

1-2

1.1 Features

-Full−featured evaluation board for a variety of single channel, eight pin Mi-

cro SOP, 12 and 16-bit, serial Output, analog to digital converters

-On-board reference and buffer circuits

-High-speed serial interface

-Modular design for use with a variety of DSP and micro controller interface

boards

1.2 Introduction

The Modular MSOP8 Evaluation Module is an updated version of the

Burr-Brown DEM-MSOP8 evaluation board. The EVM is designed so that a

single printed wiring board (PWB) supports a variety of high speed 12 and 16

bit serial ADC’s.

The 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.

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2-1

Analog Interface

For maximum flexibility, the Modular MSOP8 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. This header/socket provides

access to the analog input pins of the ADC. Consult Samtec at

www.samtec.com or call 1−800−SAMTEC−9 for a variety of mating connector

options.

Table 2−1.Analog Interface Pin Out

Pin Number Signal Description

J1.2 AD_IN+ Noninverting Input (Differential Devices)/Analog Input (Single Ended Devices)

J1.4 AD_IN−Inverting Input (Differential Devices)/Analog Ground (Single Ended Devices)

J1.6 Unused

J1.8 Unused

J1.10 Unused Pins are unused and should be left open for use with future amplifier and sensor

J1.12 Unused Pins are unused and should be left open for use with future amplifier and sensor

input modules.

J1.14 Unused

J1.16 Unused

J1.18 REF(−) Unused

J1.20 REF(+) External Reference Source Input (2.5V NOM, 2.525 MAX)

J1.15 Unused

J1.1−J1.19

(odd) AGND Analog ground connections (except J1.15)

Chapter 2

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2-2

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3-1

Digital Interface

The Modular MSOP8 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 provides access to the digital control

and serial data pins of the MSOP8 EVM. Consult Samtec at www.samtec.com

or 1−800−SAMTEC−9 for a variety of mating connector options.

Table 3−1.Digital Interface Pin Out

Pin Number Signal Description

J2.1 CS Chip Select –Active low signal, enables data transfer –jumper configurable

(see schematic)

J2.3 SCLK Serial Clock

J2.5 SCLKR Serial Clock Return (for DSP Host systems)

J2.7 FS Frame Sync for DSP host systems –alternate Chip Select through JMP2 (see

schematic)

J2.9 FSR Frame Sync Return (for DSP Host systems)

J2.11 Unused

J2.13 SDO Serial Data Output

J2.15 Unused

J2.17 Unused

J2.19 SPARE

Chapter 3

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