Texas Instruments ADS5413EVM Manual de usuario

ADS5413EVM

January 2004 Wireless Infrastructure Products

User’s Guide

SLWU012

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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

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 specified input and output voltage ranges

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.

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

60°C. The EVM is designed to operate properly with certain components above 60°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

Contents

iii

Contents

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

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

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

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

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

1.4 ADS5413 EVM Operational Procedure 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Circuit Description 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Schematic Diagram 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 Circuit Function 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.1 Analog Inputs 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.2 Clock Inputs 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.3 Control Inputs 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.4 Power 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2.5 Outputs 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Physical Description 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 PCB Layout 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Parts List 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Schematic 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Figures

3−1 Top Layer 1 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−2 Layer 2, Ground Plane 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−3 Layer 3, Power Plane 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−4 Layer 4, Power Plane 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−5 Layer 5, Ground Plane 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−6 Layer 6, Bottom Layer 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tables

1−1 Two Pin Jumper List Table 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−2 Three Pin Jumper List Table 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

3−1 Parts List 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

1-1

Overview

This user’s guide document gives a general overview of the ADS5413

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 ADS5413 EVM Operational Procedure 1−2. . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

1-2

1.1 Purpose

The ADS5413 EVM provides a platform for evaluating the ADS5413

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

conditions. This document should be used 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.

The EVM provides external SMA connectors for input of the ADC clock. The

EVM allows the user to send a single-ended or differential clock to the ADC.

Another SMA connector allows the user to send a second clock source to the

output connector along with the digital data. This allows the user to provide the

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

clock. See the Clock Inputs section for proper configuration and operation.

Digital outputs from the EVM are via a 40-pin connector. The digital lines from

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

these connectors can be found in the ADC output section.

Power connections to the EVM are via banana jack sockets. Separate sockets

are provided for the ADC core, output drivers, and external

reference/differential amplifier supplies.

1.3 Power Requirements

The EVM can be powered directly with only a 3.3-V supply if using the ADC

with 3.3-VDC output levels.

±5 V is required if using the differential amplifier input. 1.8 V is required for

DRVDD if 1.8-V logic output levels are desired.

1.3.1 Voltage Limits

Exceeding the maximum input voltages can damage EVM components.

Under voltage may cause improper operation of some or all of the EVM

components.

1.4 ADS5413 EVM Operational Procedure

The ADS5413EVM provides a flexible means of evaluating the ADS5413 in a

number of modes of operation. A basic set-up procedure that can be used as

a board confidence check is as follows:

1) Verify all jumper settings against the schematic jumper listed in Table 1−1

and Table 1−2.

1-3

Overview

Table 1−1.Two Pin Jumper List Table

Jumper Function Installed Removed Default

SJP1 Differential amplifier

common-mode voltage

input

Applies ADC common mode to

differential amplifier No connection Removed

W4 External REFT feed External Internal Removed

W9 External REFB feed External Internal Removed

Table 1−2.Three Pin Jumper List Table

Jumper Function Location: Pins 1−2 Location: Pins 2−3 Default

SJP2 Transformer and differential

amplifier common-mode

select

External common-mode voltage ADC output common-

mode voltage 2−3

W1 Reference select External reference Internal reference 2−3

W2 DRVDD voltage source +3.3 Vdc Voltage from J13 1−2

W5 Duty cycle select Duty cycle adjust off Duty cycle adjust on 1−2

W7 Power down select Operate mode Power-down mode 1−2

2) Connect supplies to the EVM as follows:

a) 3.3-V core and output driver supply to J6 and return to J5.

3) Switch power supply on.

4) Use a function generator with 50-Ωoutput to input an 65-MHz, 0-V offset,

2-Vp−pamplitude differential sine-wave signal into J3 and the

complementary signal into J4 to provide a true differential ADC input clock.

The frequency of the clock must be within the specification for the device

speed grade.

5) Use a function generator with 50-Ωoutput to input a 1.65-V offset, 3.3-Vp−p

amplitude square-wave signal into J9 to be used as the buffered output

clock. This signal must be the same frequency and synchronized with the

ADC clock.

6) Use a frequency generator with 50-Ωoutput to input a 17-MHz, 0-V offset,

1-Vp−pamplitude sine-wave signal into J2. This provides a transformer

coupled differential input signal to the ADC.

7) The digital pattern on the output connector J10 should now represent a

sine wave and can be monitored using a logic analyzer.

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