Analog Devices EV-ADF5355SD1Z Manual de usuario

Evaluation Board User Guide

UG-

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 Fractional-N/Integer-N PLL Frequency Synthesizer

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT

WARNING AND LEGAL TERMS AND CONDITIONS. Rev. Pr C | Page 1 of 17

FEATURES

Self-contained board including PLL, VCO, loop filter (3 kHz),

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 −111 dBc/Hz @ 100 kHz

offset from carrier (6.8 GHz output frequency)

GENERAL DESCRIPTION

The EV-ADF5355SD1Z is designed to evaluate the performance

of the ADF5355 frequency synthesizer. A digital picture of the

board is shown in Figure 1. It contains the ADF5355

synthesizer, a USB connector and related interface, SMA

connectors for the RF outputs, and reference signal plus headers

for various signals and voltages. There is also a loop filter

(5 kHz) on board. An SDP-S connector is required to operate

the board, this is ordered separately.

The package also contains Windows® software (XP, Vista-and

Windows 7 compatible) to allow easy programming of the

synthesizer.

EVALUATION KIT CONTENTS

Evaluation board software CD

USB cable

EV-ADF5355SD1Z

DIGITAL PICTURE OF EVALUATION BOARD

Figure 1.

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TABLE OF CONTENTS

Features .............................................................................................. 1

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

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

Digital Picture of Evaluation Board ............................................... 1

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

Evaluation Board Hardware............................................................ 3

Overview........................................................................................ 3

Power Supplies...............................................................................3

RF Output.......................................................................................3

Loop Filter......................................................................................3

Reference Source ...........................................................................3

Evaluation Set Up ..............................................................................4

Evaluation Board Software...............................................................5

Evaluation Board Schematics and Artwork...................................9

REVISION HISTORY

14/10—Revision PrC: Updated for revised components.

14/07—Revision PrB: Initial Preliminary Version

Edited description.

14/05—Revision PrA: Initial Preliminary Version

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EVALUATION BOARD HARDWARE

OVERVIEW

The EV-ADF5355SD1Z requires the SPD-S platform which

uses the EVAL-SDP-CS1Z. (SDP-B is not recommended).

POWER SUPPLIES

The EV-ADF5355SD1Zis powered from dc power connectors

(4 mm banana connectors). When feeding via banana

connectors, 6.0 V is a suitable feeding voltage. The power

supply circuitry allows the user to use two or three separate

LDOs to feed the ADF5355 (using fewer LDOs increases the

risk of spur contaminated dc feeds). Ensure the switch is in the

correct position to power the board. Consult the board

schematic in Figure 20, Figure 21, and Figure 22 to determine a

suitable setting.

The charge pump and VCO supply pins are driven from a 5V

ADM7150 high performance low noise regulator. The

remaining supplies are powered from 3.3V ADM7150’s.

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

LED, indicates when the ADF5355 is powered on. Switch S1 is

used to power the ADF5355 from the external dc connectors,

and should be switched to the left.

In case the SDP processor causes spurs on the RF output signal,

the user may remove this connector and measure the spurious.

RF OUTPUT

The EV-ADF5355SD1Z has one pair of SMA output connectors

(differential outputs RFoutA+/-). 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. If only RFoutB is

used, then it can be powered off, or if left on, both RFoutA pins

should be terminated in 50 Ohms.

The RFoutB contains the high frequency (6.8 – 13.6 GHz) and

is a single ended RF output.

LOOP FILTER

The loop filter schematic is included in the board schematic on

Figure 20. The loop filter component placements are clarified in

Figure 2. Customers wishing for lowest noise at 100 kHz offset

are advised to use the following components, and to use 0.9 mA

charge pump current, which are inserted on the evaluation

board.

C60 = 22 nF, C59 = 0.47 uF, C14 = 10 nF, C73 = 10 pF.

R14 = 220 Ohms, R1 = 470 Ohms.

Customers wishing for lowest rms phase noise should use:

C60 = 1.2 nF, C59 = 33 nF, C14 = 390 pF, C73 = 10 pF.

R14 = 1 kOhms, R17 = 3.3 kOhm.

And also program the 0.9 mA charge pump current.

Figure 2. Loop Filter Placement

REFERENCE SOURCE

The evaluation board contains a footprint for a 122.88 MHz

differential output TCXO from Vectron. If preferred, the user

may supply either a single-ended or differential reference input

to connectors REFINA and REFINB. Disconnect the power rail

to the TCXO by removing resistor R12 first.

To use a single ended REFIN, then connect a low noise 122.88

MHz reference source to REFINB. To use a differential REFIN

connect the differential signal to REFINA and REFINB. The

differential REFIN can operate to 500 MHz input frequency.

If the TCXO is removed, then an external REFIN must be used.

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EVALUATION SET UP

Figure 3. Evaluation Set Up

Spectrum

Analyzer

External DC

supply

External DC

GND

TCXO

50 Ohm

Termination

Loop filter

Lock detect LED

PLL

power

LED

Power switch

Reference In/Out

Reference (optional)

ADF5355

50 Ohm

Termination

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SOFTWARE INSTALLATION

Use the following steps to install the software.

1. Install the Analog Devices ADF4355 software by double-

clicking ADF4355 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 and Windows 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 the ADF4355 Setup.msi, both the installer

and .NET Framework can be installed from the CD

provided.

2. Connect your board by USB.

If you are using 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 ADF4355 Software Installation, Setup Wizard

1. Click Next.

Figure 5. Windows XP ADF4355 Software Installation, Select Installation

Folder

2. Choose an installation directory and click Next.

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Rev. Pr C | Page 6 of 17

Figure 6. Windows XP ADF4355 Software Installation, Confirm Installation

3. Click Next.

Figure 7. Windows XP ADF4355 Software Installation, Logo Testing

4. Click Continue Anyway.

Figure 8. Windows XP ADF4355 Software Installation, Installation Complete

5. Click Close.

Windows Vista and Windows 7 Software Installation Guide

Figure 9. Windows Vista/7 ADF4355 Software Installation, Setup Wizard

1. Click Next.

Figure 10. Windows Vista/7 ADF4355 Software Installation, Select

Installation Folder

2. Choose an installation directory and click Next.

10482-006

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Figure 11. Windows Vista/7 ADF4355 Software Installation, Confirm Installation

3. Click Next.

Figure 12. Windows Vista/7 ADF4355 Software Installation, Start Installation

4. Click Install.

Figure 13. Windows Vista/7 ADF4355 Software Installation, Install Complete

5. Click Close.

Windows XP Driver Installation Guide

Figure 14. Windows XP USB Driver Installation, Found New Hardware Wizard

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

Figure 15. Windows XP USB Driver Installation, Install Options

2. Click Next.

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

instead of ADF4xxx USB Adapter Board.

10482-011

10482-013

10482-014

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Figure 16. Windows XP USB Driver Installation, Logo Testing

3. Click Continue Anyway.

Figure 17. Windows XP USB Driver Installation, Complete Installation

4. Click Finish.

10482-015

10482-016

Evaluation Board User Guide UG-

Rev. Pr C | Page 9 of 17

EVALUATION BOARD SOFTWARE

The control software for the EV-ADF5355SD1Zis available on

the CD included in the evaluation kit. To install the software,

see the software installation section. Ensure to install the

software first.

To run the software, first connect the SDP board to the USB

port of the PC, and the SDP board to the evaluation board and

then click the ADF4355 file on the desktop or in the Start

menu. Select SDP board and click connect. Note that, when

connecting the board, it takes about 5 sec to

10 sec for the status label to change.

If the software is started before the board is connected to USB

port, an error window opens, informing that the USB device

was not found, and the No USB message is displayed in the top

right corner of the software front panel window. In this case,

connect the SDP board to the USB port and click the Connect

button.

1) Connect the SDP-S board to the EV-ADF5355 board.

2) Start the software.

3) Select SDP board as the connection method, select

ADF5355 as the part.

4) Connect 6.0V to the EV-ADF5355SD1Z board, but

ensure the switch s1 is in the off position.

5) Turn switch on (To the left).

6) Load configuration file (if applicable).

7) Write all registers.

8) A phase noise plot as below was taken with the

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

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To adjust the synthesizer parameters click the main controls tab.

Use the Frequency text box in the Reference section to set the

correct reference frequency. The default reference on the

software window is at 122.88 MHz which can be supplied

externally. Please change to the actual REFIN frequency.

Use the RF Frequency section to control the output frequency.

To achieve single-tone on the VCO output, type the desired

output frequency text box in megahertz.

Default settings are recommended for most registers. Changing

the settings on the software GUI requires the user to update the

Bleed current settings may need to be modified for optimal

operation.

Figure 19. Register Settings

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