Analog Devices AD9912 Quick Start Manual
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Analog Devices AD9912 Quick Start Manual

Analog Devices AD9912 Quick Start Manual

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FEATURES

Flexible system clock input accepts crystal, crystal oscillator,
or external reference clock
Dedicated pad for mounting crystal or crystal oscillator
DAC output easily accessible via SMA connector
SMA connectors provided for external reconstruction filter
Easy to use Windows graphical user interface
Software control of all AD9912 features
Power supplies that are easily separated
Connection via USB port
Dedicated SMA connectors for CMOS, DAC, and HSTL outputs
Residual phase noise @ 250 MHz
10 Hz offset: −113 dBc/Hz
1 kHz offset: −133 dBc/Hz
100 kHz offset: −153 dBc/Hz
40 MHz offset: −161 dBc/Hz

PACKAGE CONTENTS

AD9912 evaluation board
USB cable
CD-ROM with the following contents:
Evaluation software
Instructions
Data sheet
Schematics
AD9912/PCBZ
CONNTROLLER
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are supplied "as is" and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.

EVALUATION BOARD BLOCK DIAGRAM

SWITCHES ARE IMPLEMENTED
AS 0Ω RESISTORS
USB
CONNECTOR
USB
SERIAL
PORT
AD9912
SYSCLK/
SYSCLKB
CRYSTAL AND
CRYSTAL OSCILLATOR
ARE NOT INSTALLED
AD9912 Evaluation Board

GENERAL DESCRIPTION

The
AD9912
AD9912 direct digital synthesizer (DDS). It easily connects to a
host computer via a USB interface and allows easy access to all
AD9912 features via the Windows®-based evaluation software
and graphical user interface.
This document provides instructions for the setup and installa-
tion of the board and software and includes a description
of the various software menus and hardware connections.
Additional evaluation board details are available in the AD9912
evaluation board schematics on the included CD-ROM.
This document covers both Revision A and Revision B of the
AD9912 evaluation board. The two versions differ in that
Revision B has a convenient connection for a 1 kΩ pull-down
resistor on the loop filter pin, whereas Revision A does not.
The AD9912/PCBZ operates over an industrial temperature
range, spanning −40°C to +85°C.
LOW-PASS
RECONSTRUCTION
FILTER
UNFILTERED
DAC OUTPUT
DAC_OUT/
DAC_OUTB
FDBK_IN/
FDBK_INB
OUT_CMOS
OUT/OUTB
LOOP_FILTER
SYSTEM
CLOCK
PLL LOOP
FILTER
SYSCLK
INPUT
Figure 1.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
AD9912/PCBZ
evaluation board is an evaluation platform for the
FILTERED
DAC OUTPUT
FDBK
IN
CMOS
OUT
OUT/
OUTB
©2008 Analog Devices, Inc. All rights reserved.
www.analog.com

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Summary of Contents for Analog Devices AD9912

  • Page 1: Features

    Devices for its use, nor for any infringements of patents or other rights of third parties that may result One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. from its use. Analog Devices reserves the right to change devices or specifications at any time Tel: 781.329.4700 www.analog.com...

  • Page 2: Table Of Contents

        Evaluation Board Software Setup ........... 5 Differential Filter Design ............10     Software Installation ..............5 AD9912 System Clock PLL Loop Filter........11     Running the Software ..............5 Ordering Information ..............12     Evaluation Software Main Window ..........6 Ordering Guide ................

  • Page 3: Evaluation Board Physical Connections

    The physical on the evaluation board. These power supplies are fed by the connections for Revision A and Revision B of the AD9912 AVDD supply on connector TB1 when the following 0 Ω...

  • Page 4: Using An Oscillator For The System Clock

    AD9912/PCBZ • USING A CRYSTAL FOR THE SYSTEM CLOCK HSTL driver: put a 50 Ω terminator on OUTB (J2), and connect OUT (J1) to a spectrum analyzer. Remove C100, C101, and Transformer T5. Connect DUT FILTER OUT (J5) to FDBK IN (J6).

  • Page 5: Evaluation Board Software Setup

    The same software can be used for will install the software driver. It may be necessary to both Revision A and Revision B of the AD9912 evaluation board. disconnect and reconnect the USB cable after this happens.

  • Page 6: Evaluation Software Main Window

    Board Setup buttons on the button bar, this loads/saves an software. If the evaluation board is not found, the software AD9912 setup file (.STP). A setup file is a text file that contains prompts the user to select which evaluation board will be the AD9912 register setup file, plus any evaluation board connected.

  • Page 7: Button Bar

    These buttons allow the user load/save a AD9912 setup file (.STP). A setup file is a text file that contains the AD9912 DUT I/O Configure register setup file, plus any evaluation board settings.

  • Page 8: Evaluation Software Functional Blocks

    EVALUATION SOFTWARE FUNCTIONAL BLOCKS AD9912 evaluation software is made up of subsections that 900 MHz range. Refer to the AD9912 data sheet on the use of correspond to the AD9912’s major functional blocks. These VCO Auto Range. subsections are listed in the following sections, and each of these The charge pump current of 250 μA (default) is fine for most...

  • Page 9: Ad9912 Evaluation Board Reconstruction Filter

    20.0pF 23.0pF 14.0pF 50.0Ω EQUIVALENT CIRCUIT EQUIVALENT CIRCUIT FOR AD9912 AND FOR TRANSFORMER, TRANSFORMER IMPEDANCE MATCH, AND AD9912 FDBK_IN Figure 4. AD9912 Evaluation Board 240 MHz Single-Ended Reconstruction Filter MAGNITUDE –10 –20 –30 –40 –50 PHASE –50 –60 –100 –70 –150...

  • Page 10: Differential Filter Design

    Q = 20.0 Q = 20.0 11.0pF 6.30pF 2.00pF Q = 50.0 Q = 50.0 Q = 50.0 TO FDBK_INB 320MHz 370MHz 610MHz INTERNAL TO AD9912 DACOUT/DACOUTB DRIVER Figure 6. Differential Low-Pass Reconstruction Filter MAGNITUDE –10 –20 –30 –40 –50 –60 PHASE –70...

  • Page 11: Ad9912 System Clock Pll Loop Filter

    Table 1 are for the system clock PLL The loop bandwidth of the SYSCLK multiplier PLL can be only. Refer to the AD9912 data sheet for more details on the adjusted by means of three external components, as shown in system clock PLL and bipolar edge detector.

  • Page 12: Ordering Information

    ORDERING GUIDE ESD CAUTION Model Description AD9912/PCBZ Evaluation Board Z = RoHS Compliant Part ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. EB07190-0-1/08(0) Rev. 0 | Page 12 of 12...

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Ad9912/pcbz

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