CDMA Evaluation Board For PLL
=
FEATURES
Self-Contained Board including Synthesizer and VCO,
Loop Filter for generating CDMA frequencies (824MHz
to 849MHz)
Designed for 3kHz Loop Bandwidth
Accompanying Software allows complete control of synthe-
sizer functions from PC
Battery Operated: Choice of 3V or 5V supplies
Typical Phase Noise Performance of -81dBc/Hz @ 300 Hz
offset
Typical Spurious Performance of better than -81dBc at
30kHz offset from carrier
BLOCK DIAGRAM
Frequency Synthesizer
EV AL-ADF4112EB1
GENERAL DESCRIPTION
This board is designed to allow the user to evaluate the
performance of the ADF4112 Frequency Synthesizer for
PLL's (Phase Locked Loops). The block diagram of the
board is shown below. It contains the ADF4113 synthesizer, a pc connector, SMA connector for the reference
input, power supplies and RF output. There is also a
loop filter (3kHz bandwidth) and a VCO on board. A
cable is included with the board to connect to a pc
printer port.
The package also contains windows software to allow
easy programming of the synthesizer.
RF
V
V
DD
VCO
OUT
VCO 1
(Vari-L)
VCO 190-836T
SMA
Socket
EVAL-ADF4112EB1
PC CONNECTOR
9V BATTERY
POWER SWITCH
ON OFF
ADF4112
TCXO
Vectron
AD7706
V
P
CE
REF
IN
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of
Analog Devices.
REV.PrA 04/00
© Analog Devices, Inc., 1999
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781-329-4700 Fax: 781-326-8703
Hardware Description
The evaluation board comes with a cable for connecting to
the printer port of a PC. The silk screen and cable diagram for
the evaluation board are shown below. The board schematic is
shown on pages 3 and 4.
EV AL-ADF4112EB1
EVAL-ADF411X
EVAL-ADF421X
1
6
2
7
3
8
4
9
5
9 Way
Female D-Type
To
ADF411X
ADF421X
Evaluation
Board
Brown - DATA
Figure 2. PC Cable Diagram
Loop component values shown in the circuit diagram are for
836MHz RF output, 5mA CP current, VCO190-836T,
30kHz channel spacing and 3kHz loop bandwidth.
Black - CLK
Red - LE
Orange - CE
White - GND
Yellow
Purple
1
2
3
4
5
6
7
8
9
10
Blue
11
12
13
25 Way Male
D-Type
To
PC Printer Port
14
15
16
17
18
19
20
21
22
23
24
25
PC
Figure 1. Evaluation Board Silkscreen
The board is powered from a single 9V battery. The power
supply ciruitry allows the user to choose either 3V or 5V for
the ADF4112 V
default settings are 3V for the ADF4113 V
ADF4112 V
to note that the ADF4112 V
ADF4112 V
and VP, and for the VCO supply. The
DD
and for the VCO supply. It is very important
P
. This can damage the device.
P
should never exceed the
DD
and 5V for the
DD
All components necessary for LO generation are on-board.
The 13MHz TCXO from Vectron provides the necessary
Reference Input. The PLL is made up of the ADF4112,
passive loop filter (20kHz bandwidth) and the VCO 190836T from Vari-L. The output is available at RFOUT
through a standard SMA connector. If the user wishes they
may use their own power supplies and reference input. In
this case, they need to insert SMA connectors to as shown on
the silkscreen and block diagram.
The AD7706 A/D converter is used to monitor the power
supply voltage and current consumption of the ADF4112.
This helps the user pick the optimum synthesizer settings for
power consumption and also provides an alert if the battery
voltage is too low to sustain the required 3V or 5V for the
board supply.
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EV AL-ADF4112EB1
Figure 3. Evaluation Board Circuit Diagram (Page 1)
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EV AL-ADF4112EB1
Figure 4. Evaluation Board Circuit Diagram (Page 2)
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Software Description
The evaluation board software is contained on a CD-ROM
which comes in the package. To load the software the user
should click on “setup.exe” , then the install wizard installs
the software. Follow the on-screen directions. The software
will be installed in a default directory called “C:/Program
Files/Analog Devices”. To run the software, simply go to the
Start Menu and choose Program/ADF4XXX/
ADF4XXX_rev0. This will open the software for the evaluation board. The user will be asked to choose which device is
being evaluated. Click on the ADF4112 button. Hit OK. The
window shown below will now appear.
In this panel, click on the "Eval Board" button. Choose
ADF4112EB1 from the list on offer. Hit OK. The synthesizer
will now be programmed with the correct settings for a
CDMA system working at 836MHz. 30kHz PFD frequency
is set up, 32/33 prescaler is chosen and charge pump current
of 5mA is programmed.
If the user wishes to change any of the settings then place the
cursor over the desired parameter (RF VCO Output Fre-
EV AL-ADF4112EB1
quency, for example) and click once. This brings up a screen
where it is possible to either type in a new value of output
frequency or else increment and decrement by the channel
spacing.
The software also allows monitoring of the device supply
voltage, supply current and the charge pump voltage. Simply
hit the "Update Voltage and Current Display" button to get
an up-to-date reading.
Figure 5. Software Front Panel
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EV AL-ADF4112EB1
Table 1. Bill of Materials for the EVAL-ADF4112EB1
Qty Reference Designator Description Manufacturer PCB DECAL VALUE
1 U1 ADF4112BRU ADI TSSOP-16 ADF4112BRU
1 U2 AD7706BR ADI SO16WB AD7706BR
1 U3 AD780AR ADI SO8NB AD780AR
1 U4 ADP3300ART-5 ADI SOT23-6 ADP3300ART-5
1 U5 ADP3300ART-3 ADI SOT23-6 ADP3300ART-3
1 VCO1 VCO190-8 36T V ari-L (Acal Ele ct. = Di sti) VCO190-8 36T
1 Y1 4.9152MHz Crystal
1 Y2 19.2 MHz TCXO
1 D1 SD103C Schottky Diode General Semiconductor DO35 SD103C
1 D2 IN4001 D035 FEC 365-117
1 D3 Red Low Power LED Vishay LED FEC 657-130
1 D4 Green Low Power LED (Do Not Insert) Vishay LED FEC 657-141
2 C1 C41 0.1uF Multi Layer Ceramic Capacitor Murata Case 0603 FEC 499-675
1 C2 10uF 6.3V Tantalum Capacitor AVX CAP\TAJ_B FEC 197-014
4 C3 C26 C27 C28 100pF Multi Layer Ceramic Capacitor Murata Case 0603 FEC 499-122
2 C4 C31 22uF 6.3V Tantalum Capacitor AVX CAP\TAJ_A FEC 197-038
3 C5 C7 C11 0.1uF Multi Layer Ceramic Capacitor Murata Case 0805 FEC 317-627
5 C6 C8 C9 C12 C32 10pF Multi Layer Ceramic Capacitor Murata Case 0603 FEC 499-110
2 C13 C14 1nF Multi Layer Ceramic Capacitor Murata Case 0603 FEC 317-202
2 C21 C22 33pF Multi Layer Ceramic Capacitor Murata Case 0603 FEC 498-555
1 C23 4.7nF Multi Layer Ceramic Capacitor Murata Case 0805
1 C24 47nF Multi Layer Ceramic Capacitor Murata Case 0805
1 C25 620pF Multi Layer Ceramic Capacitor Murata Case 0805
3 C33 C36 C40 10nF Multi Layer Ceramic Capacitor Murata Case 0603 FEC 499-146
2 C34 C37 1uF 16V Tantalum Capacitor AVX CAP\TAJ_A FEC 498-701
2 C35 C38 4.7uF 10V Tantalum Capacitor AVX CAP\TAJ_A FEC 498-658
2 C39 C42 10uF 6.3V Tantalum Capacitor AVX CAP\TAJ_A FEC 197-014
Vectron International
Vectron International
HC49 low profile VXA4-1011
T-1194
1 R1 20r 5% Resistor (Surface Mount) Multicomp Case 0805 FEC 771-132
7 R2 R5 R6 R7 R8 R9 R10 330r 1% Resistor (Surface Mount) Multicomp Case 0603 FEC 911-143
1 R3 3k3 1% Resistor (Surface Mount) Multicomp Case 0603 FEC 911-290
1 R4 4k7 1% Resistor (Surface Mount) Multicomp Case 0603 FEC 911-318
2 R11 R25 Do Not Insert Case 0805
1 R18 1M 1% Resistor (Surface Mount) Multicomp Case 0603 FEC 911-598
1 R19 5k1 1% Resistor (Surface Mount) Case 0805
1 R20 22k 1% Resistor (Surface Mount) Case 0805
3 R21 R22 R23 18r 1% Resistor (Surface Mount) Multicomp Case 0603 FEC 911-021
1 R24 51r 1% Resistor (Surface Mount) Multicomp Case 0603
3 R27 R28 R29 10k 1% Resistor (Surface Mount) Multicomp Case 0603 FEC 911-355
6 R30 R31 R32 R33 R40 R41 100k 0.1% Resistor (Surface Mount) Meggitt Case 0603 FEC 911-471
2 R36 R37 330K 1% Resistor (Surface Mount) Multicomp Case 0603 FEC 911-537
2 R38 R39 0r 1% Resistor (Surface Mount) Multicomp Case 0603 FEC 772-227
1 R12 0r 1% Resistor - Do Not Insert Multicomp Case 0603 FEC 772-227
1 R42 4k7 1% Resistor (Surface Mount) Multicomp Case 0805 FEC 911-938
1 SW1 Push Button Switch Omron SW\PB-SMALL FEC 176-986
1 SW2 SPDT Switch - (Washable) Apem SW _SIP-3P FEC 150-559
18 T1-15 T19-21 Red Testpoint W Hughes TESTPOINT FEC-240-345
1 J1 9 PIN D-TYPE MALE (HORIZ) McMurdo DCON9M FEC 150-750
5 J2 J3 J4 J5 J6 Do Not Insert SMA
2 J7 GOLD 50Ω SMA SOCKET Pasternack SMA PE4118
3 LK1 LK4 LK5 3 pin header Harwin SIP-3P FEC 512-047
1 LK2-B Wire L ink
1 LK3 2 pin header Harwin SIP-2P FEC 512-035
4 LK1 LK3-5 Shorting Shunt Harwin FEC 150-410
2 P1 Pair PCB snap-on battery connector Keystone BATT_PP3 FEC 723-988
1 P1 9V PP3 Battery Duracell FEC 908-526
4 Each Corner Rubber Stick-On Feet 3M FEC 148-922
1 EVAL-ADF411XEB1 PCB ADI
Parts Free issued by ADI.
Leave position blank - Do not insert.
Vari-L - UK Distributors - Acal Electronics Tel 0044 1252 858585
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REV.PrA 04/00
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