Analog Devices UG-435 Manuel utilisateur

Evaluation Board User Guide

UG-435

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

Evaluation Board for the ADF4351 Fractional-N PLL Frequency Synthesizer

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 20

FEATURES

Self-contained board including PLL, VCO, loop filter (35 kHz),

25 MHz TCXO reference, USB interface, and voltage

regulators

Accompanying software allows control of synthesizer

functions from a PC

Choice of power supply via USB or external feeding

Typical phase noise performance of −104 dBc/Hz @ 3 kHz

offset from carrier (1 GHz output frequency)

EVALUATION KIT CONTENTS

EVAL-ADF4351EB1Z board

USB Standard-A to Mini-B cable

CD that includes

Self-installing software that allows users to control the

board and exercise all functions of the device

Electronic version of the ADF4351 data sheet

Electronic version of the UG-435 user guide

ADDITIONAL EQUIPMENT

PC running Windows XP or more recent version

Spectrum analyzer

Oscilloscope (optional)

DOCUMENTS NEEDED

ADF4351 data sheet

REQUIRED SOFTWARE

Analog Devices ADF435xPLL software (Version 4 or higher)

ADIsimPLL™

GENERAL DESCRIPTION

This board is designed to allow the user to evaluate the perfor-

mance of the ADF4351 frequency synthesizer for phase-locked

loops (PLLs). Figure 1 shows the board, which contains the

ADF4351 integrated synthesizer and VCO, SMA connectors for

the output signal, power supplies, a reference oscillator, and an

USB connector. There is also a loop filter (35 kHz) on board.

The evaluation board is set up for a 25 MHz PFD comparison

frequency. An on-board TCXO provides the 25 MHz reference

frequency.

The package also contains Windows® software (XP or later) to

allow easy programming of the synthesizer.

EVALUATION BOARD

Figure 1. EVAL-ADF4351EB1Z

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TABLE OF CONTENTS

Features .............................................................................................. 1

Evaluation Kit Contents................................................................... 1

Additional Equipment ..................................................................... 1

Documents Needed.......................................................................... 1

Required Software ............................................................................ 1

General Description ......................................................................... 1

Evaluation Board .............................................................................. 1

Revision History ............................................................................... 2

Quick Start Guide............................................................................. 3

Evaluation Board Hardware ............................................................ 4

Power Supplies .............................................................................. 4

Input Signals...................................................................................4

Loop Filter ......................................................................................4

Output Signals ...............................................................................4

Evaluation Board Setup Procedure .................................................5

Software Installation .....................................................................5

Evaluation Board Software...............................................................9

Evaluation and Test ........................................................................ 11

Evaluation Board Schematics and Artwork................................ 12

Ordering Information.................................................................... 17

Bill of Materials........................................................................... 17

REVISION HISTORY

6/12—Revision 0: Initial Version

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QUICK START GUIDE

Follow these steps to quickly evaluate the ADF4351 device:

1. Install the ADF435x software from the CD.

2. Connect the EVAL-ADF4351EB1Z to the PC and install

the necessary drivers.

3. Follow the hardware driver installation procedure.

4. Ensure that Switches SW1 and SW2 are closed.

5. Run the ADF435x software.

6. Select the USB board connection and the ADF4351 device

in the Select Device and Connection tab of the software

front panel window.

7. Click the Main Controls tab. Update all registers.

8. Connect the spectrum analyzer to J2.

9. Measure the results.

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EVALUATION BOARD HARDWARE

The EVAL-ADF4351EB1Z schematics are shown in Figure 22

to Figure 24.

POWER SUPPLIES

The EVAL-ADF4351EB1Z can be powered either from the USB

port or via dc power connectors (4 mm banana connectors).

When feeding via banana connectors, 3.75 V to 5.5 V is a

suitable feeding voltage. The power supply circuitry allows

the user to use one or two separate LDOs to feed the ADF4351

(using fewer LDOs increases the risk of spur contaminated dc

feeds). Consult the board schematic in Figure 22, Figure 23,

and Figure 24 to determine a suitable setting.

An LED, D6, indicates when USB power is available, and

another LED, D5, indicates when the ADF4351 is powered.

Switch S1 is used to power the ADF4351 from the external

dc connectors USB port and Switch S2 to power from the

USB port.

In case the USB processor or clock causes spurs on the RF

output signal, the user may feed the evaluation board via the

dc connectors and unplug the USB cable, thereby removing

power from the USB interface circuitry. There is also a

grounded frame surrounding the USB interface circuitry

to allow mounting of a shielding box.

INPUT SIGNALS

The 25 MHz TCXO from Rakon provides the necessary reference

signal. An external REFIN may be used if desired. In this case,

disable the on-board TCXO by removing L10 and R59. R9 can

be populated with 50 Ω to adjust impedance matching of the

evaluation board to the external reference source.

LOOP FILTER

The loop filter schematic is included in the board schematic on

Figure 22. The loop filter component placements are clarified in

Figure 2.

Figure 2. Loop Filter Placement

Figure 3. Evaluation Board Silkscreen

OUTPUT SIGNALS

The EVAL-ADF4351EB1Z has two SMA output connectors

(differential outputs). The device is quite sensitive to impedance

unbalance. If only one port of a differential pair is used,

terminate the other with a 50 Ω load.

The board contains 7.5 nH shunt inductors on the RF output

stages, which is optimum for a frequency range of 1 GHz to

4.4 GHz. Lower frequencies than this require larger output

stage inductors, or a 50 Ω resistor to VDD, which provides lower

output power, but wider frequency bandwidth than the

inductors. Consult the ADF4351 data sheet for more

information.

The MUXOUT signal can be monitored at the test point labeled

MUXOUT.

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EVALUATION BOARD SETUP PROCEDURE

SOFTWARE INSTALLATION

The control software and USB drivers for EVAL-ADF4351EB1Z

are on the CD, which accompanies the board. If the user runs

ADF435x_Setup.msi, then the install wizard guides the user

through the install process. Simply follow the on-screen

instructions. The software and USB drivers will be installed

in the default directory called C:\Program Files\Analog

Devices\ADF435x. The software requires Microsoft’s .NET

framework version 3.5 or later to be installed on your machine.

The installer will automatically download the framework from

the Microsoft website if you do not have this installed. If you do

not have an internet connection or a slow connection on the

PC, then you can install the .NET framework directly from the

CD. Do this by double-clicking dotnetfx35.exe. Once installed,

run the ADF435x_Setup.msi again. Note that to install the

dotnetfx35.exe, you need to have Windows Installer 3.1 or later

installed.

1. Install the Analog Devices ADF435x PLL software by

double-clicking ADF435x_Setup.msi.

If you are using Windows XP, follow the instructions in

the Windows XP Software Installation Guide section (see

Figure 4 to Figure 8).

If you are using Windows Vista or Windows 7, follow the

instructions in the Windows Vista/7 Software Installation

Guide section (see Figure 9 to Figure 13).

Note that the software requires Microsoft Windows

Installer and Microsoft .NET Framework 3.5 (or higher).

The installer connects to the Internet and downloads

Microsoft .NET Framework automatically. Alternatively,

before running ADF435x_Setup.msi, both the installer

and .NET Framework can be installed from the CD

provided.

2. Connect your SDP board (black) or USB adapter board

(green) by USB. If you are using an SDP board, the drivers

install automatically, and you are ready to run the software.

If you are using an USB adapter board on Windows XP,

follow the steps in the Windows XP Driver Installation

Guide section (see Figure 14 to Figure 17).

On Windows Vista or Windows 7, the drivers install

automatically.

Windows XP Software Installation Guide

Figure 4. Windows XP ADF435x Software Installation, Setup Wizard

1. Click Next.

Figure 5. Windows XP ADF435x Software Installation, Select Installation

Folder

2. Choose an installation directory and click Next.

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Figure 6. Windows XP ADF435x Software Installation, Confirm Installation

3. Click Next.

Figure 7. Windows XP ADF435x Software Installation, Logo Testing

4. Click Continue Anyway.

Figure 8. Windows XP ADF435x Software Installation, Installation Complete

5. Click Close.

Windows Vista/7 Software Installation Guide

Figure 9. Windows Vista/7 ADF435x Software Installation, Setup Wizard

1. Click Next.

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Figure 10. Windows Vista/7 ADF435x Software Installation, Select

Installation Folder

2. Choose an installation directory and click Next.

Figure 11. Windows Vista/7 ADF435x Software Installation, Confirm Installation

3. Click Next.

Figure 12. Windows Vista/7 ADF435x Software Installation, Start Installation

4. Click Install.

Figure 13. Windows Vista/7 ADF435x Software Installation, Installation

Complete

5. Click Close.

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Windows XP Driver Installation Guide

Figure 14. Windows XP USB Adapter Board Driver Installation, Found New

Hardware Wizard

1. Choose Yes, this time only, and click Next.

Figure 15. Windows XP USB Adapter Board Driver Installation, Installation

Options

2. Click Next.

Note that Figure 15 may list Analog Devices RFG.L Eval

Board instead of ADF4xxx USB Adapter Board.

Figure 16. Windows XP USB Adapter Board Driver Installation, Logo Testing

3. Click Continue Anyway.

Figure 17. Windows XP USB Adapter Board Driver Installation, Complete

Installation

4. Click Finish.

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EVALUATION BOARD SOFTWARE

The control software for the EVAL-ADF4351EB1Z accompanies

the EVAL-ADF4351EB1Z on a CD. To install the software, see

the Software Installation section.

To run the software, click the ADI ADF435x file on the desktop

or in the Start menu.

On the Select Device and Connection tab, choose your device,

your connection method, and click Connect.

Confirm that SDP board connected, ADF4xxx USB Adapter

Board connected, or Analog Devices RFG.L Eval Board

connected is displayed at the bottom left of the window.

Otherwise, the software has no connection to the evaluation

board.

Note that, when connecting the board, it takes about 5 sec to

10 sec for the status label to change.

Under the File menu, the current settings can be saved to and

loaded from, a text file.

Figure 18. Software Front Panel Display—Select Device and Connection

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The Main Controls tab controls the PLL settings (see Figure 19).

Use the Reference Frequency text box to set the correct

reference frequency and the reference frequency divider. The

default reference on the software window is 25 MHz.

Use the RF Settings section to control the output frequency.

You can type the desired output frequency in the RF Frequency

text box (in megahertz).

In the Registers tab, you can manually input the desired value

to be written to the registers.

In the Sweep and Hop tab, you can make the device sweep a

range of frequencies, or hop between two set frequencies.

In the Registers section at the bottom of the Main Controls

tab, the values to be written to each register are displayed. If the

background on the text box is green, the value displayed is

different from the value actually on the device. Click Write Rx

(where x = 0 to 5)to write that value to the device.

Figure 19. Software Front Panel Display—Main Controls

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