EVAL-ADF4350EB1Z Datasheet EVAL-ADF4350EB1Z | P1-P3

Evaluation Board User Guide

UG-109

One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Te l: 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. 0 | Page 1 of 12

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 −99 dBc/Hz @ 1 kHz

offset from carrier (1 GHz output frequency)

GENERAL DESCRIPTION

The EVAL-ADF4350EB1Z is designed to evaluate the perfor-

mance of the ADF4350 frequency synthesizer. A digital picture

of the board is shown in Figure 1. It contains the ADF4350

synthesizer, a USB connector and related interface, a 25 MHz

TCXO reference source, SMA connectors for the RF outputs,

and reference signal plus headers for various signals and

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

cable is included with the board to connect to a PC USB port.

The package also contains Windows® software (2000- and XP-

compatible) to allow easy programming of the synthesizer.

EVALUATION KIT CONTENTS

Evaluation board software CD

USB cable

EVAL-ADF4350EB1Z

DIGITAL PICTURE OF EVALUATION BOARD

08907-001

Figure 1.

UG-109 Evaluation Board User Guide

Rev. 0 | Page 2 of 12

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

Overvie w ........................................................................................ 3

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

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

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

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

Evaluation Setup ................................................................................4

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

Evaluation Board Schematics and Artwork ...................................6

Ordering Information .................................................................... 10

Bill of Materials ........................................................................... 10

REVISION HISTORY

3/10—Revsion 0: Initial Version

Evaluation Board User Guide UG-109

Rev. 0 | Page 3 of 12

EVALUATION BOARD HARDWARE

OVERVIEW

The EVAL-ADF4350EB1Z comes with a cable for connecting to

the USB port of a PC. The silk screen for the evaluation board is

shown in Figure 8. The board schematic is shown in Figure 5,

Figure 6, and Figure 7.

POWER SUPPLIES

The EVAL-ADF4350EB1Z can be powered either from the

USB port or via dc power connectors (4 mm banana connec-

tors). 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 ADF4350

(using fewer LDOs increases the risk of spur contaminated dc

feeds). Consult the board schematic in Figure 5, Figure 6, and

Figure 7 to determine a suitable setting.

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

another LED, D5, indicates when the ADF4350 is powered.

Switch S1 is used to power the ADF4350 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.

RF OUTPUT

The EVAL-ADF4350EB1Z 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, termi-

nate the other with a 50 Ω load. If the user wishes to utilize the

auxiliary outputs, use the EVAL-ADF4350EB2Z.

LOOP FILTER

The loop filter schematic is included in the board schematic on

Figure 5. The loop filter component placements are clarified in

Figure 2.

08907-002

Figure 2. Loop Filter Placement

REFERENCE SOURCE

The 25 MHz TCXO from Rakon Limited provides the necessary

reference signal. An external REFIN may be used if desired. In

this case, disable the on-board TCXO by removing R1 and R2.

R9 can be populated with 50 Ω to adjust impedance matching

of the evaluation board to the external reference source.

P1-P3 P4-P6 P7-P9 P10-P12

EVAL-ADF4350EB1Z

Mfr. #:

Buy EVAL-ADF4350EB1Z

Manufacturer:

Analog Devices Inc.

Description:

Clock & Timer Development Tools Evaluation Board

Lifecycle:

New from this manufacturer.

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