Analog Devices EVAL-AD7450A Скачать руководство пользователя страница 1

Страница: 1 / 28

Evaluation Board User Guide

EVAL-AD7450A/EVAL-AD7451

One

Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com

Evaluating the

AD7450A

and

AD7451

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.

Rev. A | Page 1 of 28

FEATURES

Full-featured evaluation board for the

AD7450A

and

AD7451

PC control in conjunction with the system demonstration

platform (

EVAL-SDP-CB1Z

)

PC software for control and data analysis (time and

frequency domain)

Standalone capability

EVALUATION KIT CONTENTS

EVAL-AD7450ASDZ

EVAL-AD7451SDZ

evaluation board

Evaluation software CD for the

AD7450A

AD7451

9 V mains power supply adapter

ADDITIONAL EQUIPMENT NEEDED

System demonstration platform (

EVAL-SDP-CB1Z

)

Precision analog signal source
SMB cables
USB cables

GENERAL DESCRIPTION

The

EVAL-AD7450ASDZ

EVAL-AD7451SDZ

is a full-featured

evaluation board designed to allow the user to easily evaluate all
features of the

AD7450A

and

AD7451

. The evaluation board

can be controlled via the system demonstration platform
(SDP) connector (J8). The

EVAL-SDP-CB1Z

board allows

the evaluation board to be controlled via the USB port of a
PC using the

AD7450A

AD7451

evaluation software.

The

EVAL-AD7450ASDZ

EVAL-AD7451SDZ

generates all

required power supplies on board and supplies power to the

EVAL-SDP-CB1Z

controller board. On-board components

include the following:

•

AD8599

: Ultralow distortion, ultralow noise op amp (dual)

•

ADP1613

: Step-up PWM dc-to-dc switching converter

•

ADP3303-5

: High accuracy anyCAP™ 200 mA low dropout

linear regulator

•

ADP1720

: 50 mA, high voltage, micropower linear regulator

•

ADP7104

: 20 V, 500 mA, low noise, CMOS LDO

•

ADM1185

: Quad voltage monitor and sequencer

•

ADG3308

: Low voltage, 1.15 V to 5.5 V, 8-channel

bidirectional logic level translator

•

ADR431

: Ultralow noise XFET® voltage reference with

current sink and source capability

Various link options are described in the Evaluation Board
Hardware section.

FUNCTIONAL BLOCK DIAGRAM

EVAL-SDP-CB1Z

CONTROLLER

BOARD

SERIAL
INTERFACE

ON-BOARD

POWER SUPPLIES

VAMP–

ADG3308

LEVEL

SHIFTER

VIN

DC
INPUT
JACK

VAMP+

GND

SCLK

IN+

–

ADR431

REF

VDD

GND

EVAL-AD7450ASDZ/EVAL-AD7451SDZ

ADP7104

SDP5V

ADM1185

POWER

SEQUENCER

OP AMP

SUPPLIES

VIN

7V TO 9V

SDATA

GND

REF

AD8599

IN–

INPUT A

INPUT B

SET TO DIFF
CIRCUIT

BUFFERS

EXT REF

UNIPOLAR/

BIPOLAR

SELECT

18MHz

SCLK

BF527

DSP

ADP1613

15V

ADP3303

+5V

ADP1720

3.3V

BIAS UP
CIRCUIT

AD7450A

AD7451

06231-

001

Figure 1.

Содержание EVAL-AD7450A

Страница 1: ...ntrolled via the USB port of a PC using the AD7450A AD7451 evaluation software The EVAL AD7450ASDZ EVAL AD7451SDZ generates all required power supplies on board and supplies power to the EVAL SDP CB1Z controller board On board components include the following AD8599 Ultralow distortion ultralow noise op amp dual ADP1613 Step up PWM dc to dc switching converter ADP3303 5 High accuracy anyCAP 200 mA...

Страница 2: ...Serial Interface 12 Standalone Mode 12 How to Use the Software for Evaluating the AD7450A AD7451 13 Setting Up the System for Data Capture 13 Overview of the Main Window 15 Generating a Waveform Analysis Report 16 Generating a Histogram of the ADC Code Distribution 17 Generating a Fast Fourier Transform of AC Characteristics 18 Generating a Summary of the Waveform Histogram and Fast Fourier Transf...

Страница 3: ...ther with the enclosed nylon screw nut set to ensure the boards connect firmly together 3 Connect the 9 V power supply adapter included in the kit to connecter J702 on the EVAL AD7450ASDZ EVAL AD7451SDZ board 4 Connect the EVAL SDP CB1Z board to the PC via the USB cable For Windows XP you may need to search for the EVAL SDP CB1Z drivers Choose to automatically search for the drivers for the EVAL S...

Страница 4: ...450A AD7451 evaluation board software 1 With the EVAL AD7450ASDZ EVAL AD7451SDZ board disconnected from the USB port of the PC insert the installation CD into the CD ROM drive 2 Double click the setup exe file to begin the evaluation board software installation The software is installed to the following default location C Program Files Analog Devices AD7450A AD7451 3 A dialog box appears asking fo...

Страница 5: ...tion Is Complete Installing the EVAL SDP CB1Z System Demonstration Platform Board Drivers After the installation of the evaluation board software is complete a welcome window is displayed for the installation of the EVAL SDP CB1Z system demonstration platform board drivers 1 With the EVAL SDP CB1Z board still disconnected from the USB port of the PC make sure that all other applications are closed...

Страница 6: ...rs 4 To complete the drivers installation click Finish which closes the installation wizard 06231 011 Figure 11 EVAL SDP CB1Z Drivers Setup Completing the Drivers Setup Wizard 5 Before using the evaluation board you must restart your computer A dialog box opens giving you the following options Restart Shut Down Restart Later Click the appropriate button 06231 012 Figure 12 EVAL SDP CB1Z Drivers Se...

Страница 7: ...is correctly recognized when connected to the PC Configuring the Evaluation and SDP Boards 1 Connect the EVAL AD7450ASDZ EVAL AD7451SDZ board to Connector A or Connector B on the EVAL SDP CB1Z board a Screw the two boards together using the nylon screw nut set included in the evaluation board kit to ensure that the boards are connected firmly together 2 Connect the power supplies on the EVAL AD745...

Страница 8: ... positions are as required by the operating mode When using the EVAL AD7450ASDZ EVAL AD7451SDZ in conjunction with the EVAL SDP CB1Z board connect the ac transformer to Connector J702 VCC VDD VSS and VDRIVE are generated on board Alternatively a bench power supply may be connected to J700 to supply 7 V to 9 V Table 1 External Power Supply Required Power Supply Connector Voltage Range Purpose VIN 1...

Страница 9: ...itive terminal of U5 B Position A VREF is supplied to U5 B Position B INPUT B is supplied to U5 B Position C 0 V is supplied to U5 B LK6 VIN source selection Select which buffered signal is routed to AD7450A AD7451 Pin VIN Position A Signal is sourced from single ended to differential buffer output U5 A Position B Signal is sourced from single ended buffer U10 A Position C Signal is sourced from b...

Страница 10: ...mplifier negative voltage supplied from an on board supply LK102 A Amplifier positive voltage supplied from an on board supply LK701 A VDD supplied from on board supply 5 V Table 4 Link Options Setup Conditions for AD7451 Link No Position Function LK1 C INPUT A is connected to bias up circuit U7 LK2 Inserted INPUT A input impedance is 51 Ω LK3 B INPUT B is connected to single ended buffer U10 B LK...

Страница 11: ...D7450ASDZ EVAL AD7451SDZ are filtered and buffered by an AD8599 The outputs from this amplifier are available to the AD7450A AD7451 VIN input via low pass RC filter network REFERENCE OPTIONS The reference source can be from an ADR431 ultralow noise XFET voltage references with current sink and source capability U2 An external reference voltage may also be applied to J3 EXT_REF SOCKETS CONNECTORS T...

Страница 12: ...nicates with the EVAL SDP CB1Z board using level shifters The EVAL SDP CB1Z operates at a 3 3 V logic level This allows VDRIVE voltages exceeding 3 3 V to be used without damaging the SDP interface Details of the serial interface can be found in the AD7450A and AD7451 data sheets STANDALONE MODE The EVAL AD7450ASDZ EVAL AD7451SDZ may also be used without the EVAL SDP CB1Z In this case connect to t...

Страница 13: ...Click Device Manager from the list of System Tools see Figure 13 b Analog Devices System Development Platform 32MB should appear under ADI Development Tools indicating that the EVAL SDP CB1Z driver software is installed and that the board is connected to the PC correctly 06231 013 Figure 13 Device Manager Checking that the Board Is Connected to the PC Correctly Launching The Software After complet...

Страница 14: ...Evaluation Board User Guide Rev A Page 14 of 28 06231 015 CONTROL CURSOR CONTROL PANNING CONTROL ZOOMING NOTES 1 FOR DETAILS ABOUT THE AREAS HIGHLIGHTED IN RED SEE THE OVERVIEW OF THE MAIN WINDOW SECTION Figure 15 Setup Screen ...

Страница 15: ... rate of the ADC selected from the drop down menu Exit Button Section 5 Clicking Exit labeled 5 in Figure 15 closes the software Alternatively you can select Exit from the File menu Busy LED Section 6 The Busy LED labeled 6 in Figure 15 indicates when a read is in progress from the EVAL SDP CB1Z board Tabs Area Section 7 There are four tabs available in the tabs area labeled 7 in Figure 15 of the ...

Страница 16: ... WAVEFORM ANALYSIS REPORT Figure 18 illustrates the waveform capture tab for a 100 kHz sine wave input signal The Waveform Analysis area labeled 1 in Figure 18 reports the amplitudes recorded from the captured signal and the frequency of the signal tone 06231 016 Figure 18 Waveform Tab ...

Страница 17: ...ick the Histogram tab from the main window 3 Click Sample Raw data is then captured and passed to the PC for statistical computations and various measured values are displayed in the Histogram Analysis area DC Input More commonly the histogram would be used for dc testing where the user tests the ADC for the code distribution for dc input and computes the mean and standard deviation or transition ...

Страница 18: ...ed on the sinusoidal signal applied b If a low frequency band pass filter is used when the full scale input range is more than a few volts peak to peak use the on board amplifiers to amplify the signal thus preventing the filter from distorting the input signal 2 Click the FFT tab from the main window 3 Click Sample As in the histogram test raw data is captured and passed to the PC where the FFT i...

Страница 19: ...Y OF THE WAVEFORM HISTOGRAM AND FAST FOURIER TRANSFORM Figure 21 shows the Summary tab The Summary tab captures all the display information and provides it in one panel with a synopsis of the information including key performance param eters such as SNR and THD 06231 019 Figure 21 Summary Tab ...

Страница 20: ...EVAL AD7450A EVAL AD7451 Evaluation Board User Guide Rev A Page 20 of 28 EVALUATION BOARD SCHEMATIC AND ARTWORK 06231 022 Figure 22 Schematic Page 1 ...

Страница 21: ...Evaluation Board User Guide EVAL AD7450A EVAL AD7451 Rev A Page 21 of 28 06231 023 Figure 23 Schematic Page 2 ...

Страница 22: ...EVAL AD7450A EVAL AD7451 Evaluation Board User Guide Rev A Page 22 of 28 06231 024 Figure 24 Schematic Page 3 ...

Страница 23: ...Evaluation Board User Guide EVAL AD7450A EVAL AD7451 Rev A Page 23 of 28 06231 025 Figure 25 Schematic Page 4 ...

Страница 24: ...EVAL AD7450A EVAL AD7451 Evaluation Board User Guide Rev A Page 24 of 28 06231 026 Figure 26 Schematic Page 5 ...

Страница 25: ...Evaluation Board User Guide EVAL AD7450A EVAL AD7451 Rev A Page 25 of 28 06231 027 Figure 27 Top Printed Circuit Board PCB Silkscreen 06231 028 Figure 28 Layer 1 Component Side View ...

Страница 26: ...EVAL AD7450A EVAL AD7451 Evaluation Board User Guide Rev A Page 26 of 28 06231 029 Figure 29 Layer 2 Component Side View 06231 030 Figure 30 Layer 3 Component Side View ...

Страница 27: ...Evaluation Board User Guide EVAL AD7450A EVAL AD7451 Rev A Page 27 of 28 06231 031 Figure 31 Layer 4 Component Side View ...

Страница 28: ...ard to any other party for any reason Upon discontinuation of use of the Evaluation Board or termination of this Agreement Customer agrees to promptly return the Evaluation Board to ADI ADDITIONAL RESTRICTIONS Customer may not disassemble decompile or reverse engineer chips on the Evaluation Board Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the...

Результаты поиска

Содержание EVAL-AD7450A

Отзывы:

Похожие инструкции для EVAL-AD7450A

Бренды по названию

Популярные бренды

Analog Devices EVAL-AD7450A, Руководство пользователя

Результаты поиска

Содержание EVAL-AD7450A

Отзывы:

Похожие инструкции для EVAL-AD7450A

Бренды по названию

Популярные бренды