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Evaluation Board For PLL Frequency Synthesizer
EVAL-ADF4208EB1
GENERAL DESCRIPTION
FEATURES Evaluation Board featuring the ADF4208 synthesiser. Requires only RF and IF VCO's and Loop Filters for dual PLL. Complete with SMA connectors, battery, and on board 10MHz Crystal. Programmable via a serial interface. Accompanying Software allows complete control of synthesizer functions from PC using Windows 95/98/NT Battery Operated: Choice of 3V or 5V supplies On Board Monitoring of Current and Voltage.
This board is designed to allow the user to evaluate the performance of the ADF4208 Dual Frequency Synthesizer for PLL's (Phase Locked Loops). The block diagram of the board is shown below. It contains the ADF4208 synthesizer, a pc connector, and SMA connections for refererence input, power supplies and RF and IF output. The board only requires an RF VCO and loop filter and an IF VCO and loop filter. 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.
BLOCK DIAGRAM
V
9V B A TTE R Y 9V B A TTE R Y DD
V
P O W E R S W ITCH VCO ON O FF V VCO 1 VCO 2 VCO2 V TU N N ot P op ulated VCO2 FO U T SMA S ocket IF REF 10 M H z C rystal IN R S ET A D 7706 7706 E VA L-A D F4208E B 1 P C C O N NE C TO R P C C O N NE C TO R OUT P
VCO1 V TU N VCO1 FO U T
N ot P op ulated SMA S ocket
A D F4208
RF
OUT
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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.
(c) 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
EVAL-ADF4208EB1
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.
EVAL-ADF411X EVAL-ADF421X
6 7 8 9
1 2 3 4 5
Black - CLK Brown - DATA Red - LE Orange - CE White - GND Yellow
1 2 3 4 5 6 7 8 9
Blue
14 15 16 17 18 19 20 21 22 23 24
PC
9 Way Female D-Type To ADF411X ADF421X Evaluation Board
10 11 12
Purple
25 13
25 Way Male D-Type To PC Printer Port
Figure 2. PC Cable Diagram
connectors. If the user wishes they may use their own power supplies and use the reference output. 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 ADF4208. 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.
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 ADF4208 VDD and VP, and for the VCO supply. The default settings are 3V for the ADF4208 VDD and 5V for the ADF4208 VP and for the VCO supply. It is very important to note that the ADF4208 VDD should never exceed the ADF4208 VP. This can damage the device. All components necessary for LO generation are catered for on-board. The crystal oscillator circuit provides the necessary 10MHz reference frequency. The addition of an SMA connector allows an external reference to be used (Please consult circuit diagram to see what components are needed to be added or removed for this). The PLL requires a loop filter and VCO for both the IF and RF sides to complete the dual PLL. The output is available at RF OUT and IF OUT through standard SMA
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EVAL-ADF4208EB1
Figure 3. Evaluation Board Circuit Diagram (Page 1)
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EVAL-ADF4208EB1
Figure 4. Evaluation Board Circuit Diagram (Page 2)
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EVAL-ADF4208EB1
Software Description
The software comes on a CD. If the user runs "ADF4XXXEvaluationSoftware.exe" on the CD, 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\ADF4xxx Evaluation Software". To run the software, simply double click on "ADF4XXX Eval Software.exe". The front panel of the evaluation board software is shown below. When the device window appears, choose the ADF4208 and click OK. The main software screen now appears. Follow the steps below for initial setup to interface to the part. Click on Choose Port, and the Port Connector window will appear. Choose the port that the cable is connected to on the PC and click OK. (Normally LPT1)
Click on REF IN Frequency, and the REF IN Frequency window will appear. Enter the reference frequency being used and click OK. This will be 10MHz with the Crystal. Click on RF VCO Output Frequency, and the Output Frequency window will appear. Enter the output frequency and PFD reference frequency, and click OK. Repeat this for the IF side. Click On Prescaler, and the Prescaler window will appear. Grab the pointer, and choose the desired prescaler value. Click OK. Click on the RF PD Polarity button to set the RF PD Polarity bit High. Click on Charge Pump Current Setting 2 or Charge Pump Current Setting 1 and the Current Setting window will appear. Grab the pointer to set the Charge Pump Current Setting. Click OK. The data is now set up, and other features can now be examined by the user.
Figure 5. Software Front Panel
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Table 1. Bill of Materials for the EVAL-ADF4208EB1
Qty Re fe re nce 1 1 1 1 1 1 1 1 1 1 1 1 1 1 6 1 2 6 2 8 1 1 1 4 1 1 1 3 2 2 2 1 7 1 2 1 6 2 1 1 1 1 1 1 3 6 3 2 1 1 1 20 1 5 2 3 1 4 4 2 1 1 U1 U2 U3 U4 U5 U6 V CO1 V CO2 Y1 Y2 D1 D2 D3 D4 C1 C5 C7 C9 C11 C41 C2 C3 C29 C4 C6 C8 C10 C12 C30 C13-14 C15-17 C26-28 C43-44 C18 C19 C20 C21-22 C31-32 C23 C24 C25 C33 C36 C40 C34 C37 C35 C38 C39 C42 R1 R2 R5-10 R3 R4 R18 R11 R12-14 R21-23 R15 R24 R16 R17 R19 R20 R25 R26 R27-29 R30-33 R40-41 R34-35 R38 R36 R37 R42 SW 1 SW 2 T1-20 J1 J2 J3 J4 J5 J8 J6 J7 LK 1 LK 2 LK 3 LK 4 LK 1-4 E ac h Corner P1 P1 P CB De scription A DF4208B RU A D7706B R A D780A R A DP 3300A RT-5 A DP 3300A RT-3 Do Not Ins ert Do Not Ins ert Do Not Ins ert 4.9152M Hz Cry s tal 10M Hz Cry s tal S D103C S c hottk y Diode IN4001 Red Low P ower LE D Green Low P ower LE D (Do Not Ins ert) M ulti Lay er Ceram ic Tantalum Capac itor Tantalum Capac itor M ulti Lay er Ceram ic Do Not Ins ert M ulti Lay er Ceram ic Do Not Ins ert Do Not Ins ert Do Not Ins ert M ulti Lay er Ceram ic Do Not Ins ert Do Not Ins ert Do Not Ins ert M ulti Lay er Ceram ic Tantalum Capac itor Tantalum Capac itor Tantalum Capac itor Res is tor (S urfac e Res is tor (S urfac e Res is tor (S urfac e Res is tor (S urfac e Do Not Ins ert Res is tor (S urfac e Res is tor (S urfac e Do Not Ins ert Do Not Ins ert Do Not Ins ert Do Not Ins ert Do Not Ins ert Res is tor (S urfac e Res is tor (S urfac e Res is tor (S urfac e Do Not Ins ert Res is tor (S urfac e Res is tor (S urfac e Capac itor M a nufa cture r A DI A DI A DI A DI A DI Fairc hild V ari-L V ari-L
V ec tron International V ec tron International
P CB DECAL TS S OP -20 S O 16W B S O 8NB S O T23-6 S O T23-6 S O T23-5
V ALUE A DF4208B RU A D7706B R A D780A R A DP 3300A RT-5 A DP 3300A RT-3 NC7S M 508
General S em ic onduc tor V is hay V is hay M urata AVX AVX M urata M urata M urata M urata M urata M urata M urata M urata M urata M urata M urata AVX AVX AVX B ourns B ourns B ourns B ourns B ourns B ourns B ourns
HC49 low profile HC49 low profile DO 35 D035 LE D LE D Cas e 0603 CA P \TA J_B CA P \TA J_A Cas e 0603 Cas e 0603 Cas e 0603 Cas e 0805 Cas e 0805 Cas e 0805 Cas e 0603 Cas e 0805 Cas e 0805 Cas e 0805 Cas e 0603 CA P \TA J_A CA P \TA J_A CA P \TA J_A Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e Cas e 0805 0603 0603 0603 0603 0603 0603 0805 0805 0805 0805 0805 0603 0603 0603 0603 0603 0603
V XA 4-1011 V XA 4-1B 2-10M 00 S D103C FE C 365-117 FE C 657-130 FE C 657-141 0.1uF 10uF 6.3V 22uF 6.3V 10pF 1nF 100pF
Capac itor Capac itor
Capac itor
33pF
Capac itor
10nF 1uF 16V 4.7uF 10V 10uF 6.3V 20r 1.0% 330r 1.0% 3k 3 1.0% 1M 1.0% 51r 1.0% 18r 1.0% 51r 1.0%
M ount) M ount) M ount) M ount) M ount) M ount)
M ount) M ount) M ount) M ount) M ount)
B ourns B ourns M eggitt B ourns B ourns Om ron A pem W Hughes M c M urdo P as ternac k Harwin Harwin Harwin 3M K ey s tone Durac ell
1k 1.0% 10k 1.0% 100k 0.1% 0r 1.0% 330k 1.0% 4k 7 1.0% FE C 176-986 FE C 150-559 FE C-240-345 FE C 150-750 P E 4118 FE C FE C FE C FE C 512-047 512-035 150-410 148-922
P us h B utton S witc h S P DT S witc h - (W as hable) Red Tes tpoint 9 P IN D-TY P E M A LE (HORIZ) Do Not Ins ert GO LD 50 S M A S OCK E T 3 pin header 4 pin header (2x 2) S horting S hunt Rubber S tic k -O n Feet P air P CB s nap-on battery c onnec tor 9V P P 3 B attery E V A L-A DF4208E B 1
S W \P B -S M A LL S W _S IP -3P TE S TP OINT DCON9M SMA SMA S IP -3P
B A TT_P P 3
FE C 723-988 FE C 908-526
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