Texas Instruments AFEDRI8201EVM Bedienungsanleitung

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August 2005

User’s Guide

SBAU099B

High-Speed Communications

IMPORTANT NOTICE

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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 be fit for commercial use. As such, the goods being provided

may not be complete in terms 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.

The user assumes all responsibility and liability for proper and safe handling of the goods. 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.

TI currently deals with a variety of customers for products, and therefore our arrangement 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.

Please read the EVM User’s Guide and, specifically, the EVM Warnings 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.

Persons handling the product must have electronics training and observe good laboratory 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 0 V to 5 V and the output

voltage range of 0 V and 3.3 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

50°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.

Mailing Address:

Texas Instruments

Post Office Box 655303

Dallas, Texas 75265

Preface

Read This First

About This Manual

This user’s guide provides the information needed to set up and operate the

AFEDRI8201EVM evaluation module. For a more detailed description of the

AFEDRI8201, please refer to the product data sheet available from the Texas

Instruments web site at http://www.ti.com. Additional support documents are

listed in the sections of this guide entitled Related Documentation from Texas

Instruments.

How to Use This Manual

Throughout this document, the acronym EVM and the phrase evaluation

module are synonymous with the AFEDRI8201EVM.

Information About Cautions

This book contains cautions.

This is an example of a caution statement.

A caution statement describes a situation that could potentially

damage your software or equipment.

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

Please read each caution carefully.

Contents

Related Documentation From Texas Instruments

The following documents provide information regarding Texas Instrument inte-

grated circuits used in the assembly of the AFEDRI8201EVM. These docu-

ments are available from the TI web site. The last character of the literature

number corresponds to the document revision, which is current at the time of

the writing of this user’s guide. Newer revisions may be available from the TI

web site at http://www.ti.com or by calling the Texas Instruments Literature Re-

sponse Center at (800) 477−8924 or the Product Information Center at (972)

644−5580. When ordering, identify the document(s) by both title and literature

number.

Data Sheets: Literature Number:

AFEDRI8201 SBWS017

If You Need Assistance

If you have questions regarding either the use of this evaluation module or the

information contained in the accompanying documentation, please contact

the Texas Instruments Product Information Center at (972) 644−5580 or visit

the TI Semiconductor Online Technical Support pages at http://www.ti.com.

FCC Warning

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

generate, use, or radiate radio frequency energy and has not been tested for

compliance with the limits of computing devices pursuant to sub-part J of part

15 of the FCC regulations, which are designed to provide reasonable protec-

tion 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.

Trademarks

All trademarks are the property of their respective owners.

AFEDRI8201EVM

The AFEDRI8201EVM is designed to assist with evaluating the performance

of the AFEDRI8201 analog-to-digital converter (ADC) with digital

downconverter.

Topic Page

1 Overview 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Purpose 2

EVM Basic Functions 2

Power Requirements 2

Operational Procedure 3

2 Circuit Description 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Analog Inputs 4

Clock Inputs 4

Serial Interface 4

Outputs 4

3 Software Description 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Xilinx FPGA Software 5

Visual Basic Software 5

4 Physical Description 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Schematic, PCB Layout, and Bill of Materials 8

Overview

1 Overview

This user’s guide gives a general overview of the AFEDRI8201 evaluation

module (EVM), and provides a general description of the feature and functions

to be considered while using this module.

1.1 Purpose

The AFEDRI8201EVM is a platform for evaluating the AFEDRI8201 ADC with

digital downconverter under various signal, reference, and supply conditions.

This document should be used in combination with the EVM schematic

diagrams (see Figure 2, Figure 3, and Figure 4) and the supplied USB

interface drive software.

1.2 EVM Basic Functions

Analog input to the AFE is provided via external SMA connectors. The single-

ended input is converted into a differential signal at the input of the device. The

input path is transformer-coupled.

The EVM provides one external SMA connector for converting the single-

ended input to a differential AFE clock signal at the input of the device.

Digital outputs from the EVM are via two 40-pin connectors and two DSK

peripheral 80-pin connectors.

The AFE internal registers can be programmed using the onboard USB inter-

face module through a PC.

Power connections to the EVM are made through either a 5V DC supply, or

3.3V and 1.8V supplies.

1.3 Power Requirements

The EVM can be powered in one of two ways:

1) The EVM can be powered directly with a +5V supply if using the AC/DC

(+90V to +265V AC input/+5V DC output adapter) module; or

2) The EVM can be powered by lab power from +5V analog, 3.3V analog,

3.3V digital, and 1.8V digital supplies.

Voltage Limits

Exceeding the maximum input voltages can damage EVM

components. Undervoltage may cause improper operation of some

or all of the EVM components.

Operational Procedure

AFEDRI8201EVM

1.4 Operational Procedure

The AFEDRI8201EVM provides a flexible means of evaluating the AFE-

DRI8201 in a number of modes of operation. The following basic setup proce-

dure can be used as a board confidence check.

1) Verify all jumper settings against the jumper lists in Table 1, Table 2, and

Table 3.

Table 1. Pin Jumper List Table

Jumper Function Installed Default

JP1 GSET of Test DAC No N/A

JP2 Lab 5V DC/DSP

Voltage Supply Switch Yes Ext

JP3 Digital Input Voltage:

Lab 5V DC/3.3V Yes Int

JP4 3.3V Digital Supply Operation:

Lab 3.3V/Regulator 3.3V Yes Int

JP5 1.8V Digital Supply Operation:

Lab 1.8V/Regulator 1.8V Yes Int

JP6 3.3V Analog Supply Operation:

Lab 3.3V/Regulator 3.3V Yes Int

Table 2. Jumper and Push Button Switch List Table

Jumper Function Default

S1 FGPA Reset Open

S3 Program Reset Open

JP7 Aux DAC Output Open

Table 3. Relay List Table

Jumper Function

K1A DSK Connector Option to SCK

K2A DSK Connector Option to MOSI

K3A DSK Connector Option: MISO or DOUT1

2) Connect supplies to the EVM in the following manner:

-+5V Lab Supply to P6 (default setup)

-+5V AC/DC Supply to JP2 (only for testing external AC/DC supply)

-+3.3V Analog Supply to P8 (only for testing 1.8V or 3.3V supplies)

-+3.3V/1.8V Lab Supply to P7 (only for testing 1.8V or 3.3V supplies)

Circuit Description

2 Circuit Description

The schematic diagrams for the EVM are located at the end of this document

(see Figure 2, Figure 3, and Figure 4).

2.1 Analog Inputs

The EVM can be configured to provide the AFE with transformer-coupled in-

puts from a single-ended source. The inputs are provided via SMA connectors

(J6) for a transformer-coupled input.

2.2 Clock Inputs

The initial configuration of the EVM provides a transformer-coupled clock input

(J8) to the AFE differential clock.

2.3 Serial Interface

The EVM has a USB interface input through FPGA to control a serial bus to

operate of the registers of the AFE.

2.4 Outputs

The data outputs from the AFE have two possible connection options: two

40-pin connectors (P3 and P4), or two DSK 80-pin connectors (P1 and P5).

-40-pin connector output pins:

JI Output: on connector P3 (Digital Interface 1), from pin 4 (LSB) to pin

34 (MSB), even pins only (odd pins are ground).

JQ output: on connector P4 (Digital Interface 2), from pin 2 (LSB) to pin

32 (MSB), even pins only (odd pins are ground).

JStrobe: On connector P3, pin 2 (sample I and Q data on falling edge of

strobe)

-80-pin connector output pins:

JSee schematic diagrams shown in Figure 2, Figure 3, and Figure 4.

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