ANALOG DEVICES UG-158 Service Manual

Evaluation Board User Guide

UG-158

One Technology Way •P.O. Box 9106 •Norwood, MA 02062-9106, U.S.A. •Tel: [phone] •Fax: [phone] •www.analog.com

Evaluation Board for the 7.5 GHz PLL Frequency Synthesizer

FEATURES

On-board regulators for 3 V, 5 V, 12 V power supplies Includes OP27 for active filter applications

Designed for simple hook-up to an external VCO board

GENERAL DESCRIPTION

This board is designed to allow the user to evaluate the performance of the ADF4007 frequency synthesizer for PLLs (phase locked loops). The block diagram of the board is shown in Figure 1. It contains the ADF4007 synthesizer, links for choosing the divide ratio (8, 16, 32, and 64), an SMA connector for the reference input, and an RF input and output.

EVALUATION BOARD CONNECTION DIAGRAM

ON

OFF

+15V

POWER SWITCH

0V

OP27G

VTUNE

RFIN

ADF4007

RFOUT

1

0

M1

1

M2

0

REFIN

1

N1

0

1

N2

0

EVAL-ADF4007EBZ1

Figure 1.

MUXOUT

01943-001

PLEASE SEE THE LAST PAGE FOR AN IMPORTANT	Rev. 0 | Page 1 of 8
WARNING AND LEGAL TERMS AND CONDITIONS.

UG-158		Evaluation Board User Guide
TABLE OF CONTENTS
Features ..............................................................................................	1	Equipment List ..............................................................................	4
General Description .........................................................................	1	Test Procedure ...............................................................................	4
Evaluation Board Connection Diagram........................................	1	Evaluation Board Schematics...........................................................	5
Revision History ...............................................................................	2	Ordering Information.......................................................................	7
Hardware Description......................................................................	3	Bill of Materials..............................................................................	7
Test Procedure For EVAL-ADF4007EBZ1....................................	4

REVISION HISTORY

12/10—Revision 0: Initial Version

Rev. 0 | Page 2 of 8

Evaluation Board User Guide

UG-158

HARDWARE DESCRIPTION

The evaluation board is designed to work with an external VCO. The layout accommodates loop filter components and also has an op amp (OP27) for an active filter, if needed. The silk screen for the evaluation board is shown in Figure 2. The board schematic is shown in Figure 3 and Figure 4.

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Figure 2. Evaluation Board Silkscreen

The board is powered from a single external 15 V supply. The power supply circuitry allows the user to choose either 3 V or 5 V for the ADF4007 VP. The ADF4007 VDD is 3.0 V, and the OP27 VCC is 12 V. It is very important to note that the ADF4007 VDD should never exceed 3.3 V or the ADF4007 VP, whichever is less. Doing so can damage the device.

VTUNE is available at an output SMA connector. This should be connected to an external VCO board. The output of this board should then be connected back into the EVAL-ADF4007EBZ1 at RFIN. This is split into two equal power levels with one going to RFOUT and the other going to the RFIN of the ADF4007 to close the loop in the PLL. The RFOUT can be fed to a spectrum analyzer to test the output signal. It should have an amplitude of 6 dB down from the VCO specified output level.

Rev. 0 | Page 3 of 8