UG-162: CDMA Evaluation Board For PLL Frequency Synthesizer PDF

UG-162: CDMA Evaluation Board For PLL Frequency Synthesizer PDF
Evaluation Board User Guide
UG-162
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
CDMA Evaluation Board For PLL Frequency Synthesizer
FEATURES
GENERAL DESCRIPTION
Self-contained evaluation board that includes a synthesizer,
VCO, and loop filter for generating CDMA frequencies
(824 MHz to 849 MHz)
Designed for 3 kHz loop bandwidth
Accompanying software allows complete control of
synthesizer functions from a PC
Battery operated: choice of 3 V or 5 V supply
Typical phase noise performance of −81 dBc/Hz at 300 Hz offset
Typical spurious performance of better than −81 dBc at
30 kHz offset from carrier
The EVAL-ADF4112EBZ1 evaluation board is designed to evaluate
the performance of the ADF4112 frequency synthesizer for phase
locked loops (PLLs). Figure 1 is the functional block diagram of
the board and shows the ADF4112 frequency synthesizer, a PC
connector, an SMA connector for the reference input, the power
supplies, and an RF output. There is also a loop filter (3 kHz bandwidth) and a voltage controlled oscillator (VCO) incorporated
on the board. A cable is included in the evaluation board package
to connect the evaluation board to a PC printer port.
The evaluation board package contains Windows® based software
to allow easy programming of the ADF4112 frequency synthesizer.
FUNCTIONAL BLOCK DIAGRAM
9V BATTERY
VDD
VVCO
POWER SWITCH
ON
TEST
TEST
OFF
FILTER
VCO
VP
MUXOUT
ADF411x
REFIN
SMA
SOCKET
CE
TCXO
EVAL-ADF4112EBZ1
PC CONNECTOR
Figure 1.
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. 0 | Page 1 of 8
09147-001
RFOUT
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Evaluation Board User Guide
TABLE OF CONTENTS
Features .............................................................................................. 1 Evaluation Board Software...............................................................4 General Description ......................................................................... 1 Installing the Software ..................................................................4 Functional Block Diagram .............................................................. 1 Using the Software ........................................................................4 Revision History ............................................................................... 2 Evaluation Board Schematics...........................................................5 Evaluation Board Hardware ............................................................ 3 REVISION HISTORY
7/11—Revision 0: Initial Version
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EVALUATION BOARD HARDWARE
The evaluation board package includes a cable for connecting
the EVAL-ADF4112EBZ1 to the printer port of a PC. The
silkscreen and cable diagram for the evaluation board are
shown in Figure 2 and Figure 3. The board schematics are
shown in Figure 5 and Figure 6.
VDD of the ADF4112 and 5 V for the VP of the ADF4112 and for
the supply of the VCO.
It is important to note that the VDD of the ADF4112 should never
exceed the VP of the ADF4112 because damage to the device
may result.
The EVAL-ADF4112EBZ1 includes all the components required
for LO generation. A 13 MHz temperature compensated crystal
oscillator (TCXO) from Vectron International, Inc., provides the
necessary reference input. The PLL comprises the ADF4112
frequency synthesizer, the passive loop filter (20 kHz bandwidth),
and the VCO (190-836T from Vari-L Company, Inc.). The output
is available at RFOUT through a standard SMA connector. A
different reference input and different power supplies can be
used, if desired. In this case, insert SMA connectors as shown in
the silkscreen (Figure 2) and cable diagram (Figure 3).
ADF4112EBZ1
6
1
7
2
8
3
9
4
5
1
BLACK—CLK 2
BROWN—DATA 3
RED—LE 4
ORANGE—CE 5
WHITE—GND
09147-002
YELLOW 6
7
8
9
BLUE 10
NOTES:
1. THE VALUES FOR LOOP COMPONENTS ARE AS FOLLOWS:
C1 = 4.7nF, C2 = 47nF, C3 = 620pF, R1 = 5.1kΩ, R2 = 22kΩ.
11
12
PURPLE 13
Figure 2. Evaluation Board Silkscreen
The evaluation board is powered from a single 9 V battery. The
power supply circuitry allows the user to individually choose either
3 V or 5 V for the VDD of the ADF4112, the VP of the ADF4112,
and the supply of the VCO. The default settings are 3 V for the
Rev. 0 | Page 3 of 8
Figure 3. PC Cable Diagram
14
15
16
17
18
19
20
21
22
23
24
25
PC
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Evaluation Board User Guide
EVALUATION BOARD SOFTWARE
INSTALLING THE SOFTWARE
The ADF4112 frequency synthesizer is then programmed with
the correct settings for a CDMA system working at 836 MHz. In
addition, a 30 kHz PFD frequency is set up, a 32/33 prescaler is
chosen, and a charge pump current of 5 mA is programmed.
To load the software, double-click setup.exe, and then follow
the on-screen instructions from the installation wizard. The
software is installed into the default directory C:/Program
Files/Analog Devices.
To change any of these settings, click the parameter to be
modified (for example, click RF VCO Output Frequency). A
dialog box appears in which you can either type in a new value
or increment and decrement the set value by the channel spacing.
The evaluation board software is provided on the CD-ROM
included in the evaluation board package.
USING THE SOFTWARE
To run the software,
2.
3.
From the Start menu, point to Program and ADF4XXX,
and then click ADF4XXX_revx.
A dialog box appears, asking which device is to be
evaluated. Select ADF4112, and click OK. The Main
Interface Page window appears (see Figure 4).
Click Evaluation Board, and the Evaluation Board window
appears. Select ADF4112EBZ1 from the list, and click OK.
09147-006
1.
Figure 4. Main Interface Page Window
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EVALUATION BOARD SCHEMATICS
09147-004
Figure 5. Evaluation Board Circuit Diagram (Page 1)
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09147-005
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Figure 6. Evaluation Board Circuit Diagram (Page 2)
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NOTES
Rev. 0 | Page 7 of 8
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Evaluation Board User Guide
NOTES
ESD Caution
ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection
circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
Legal Terms and Conditions
By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions
set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you
have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc.
(“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal,
temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided
for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional
limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term
“Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including
ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may
not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to
promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any
occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board.
Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice
to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO
WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED
TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL
PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF
THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE
AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable
United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of
Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby
submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed.
©2011 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
UG09147-0-7/11(0)
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