Analog Devices ADF4113EB2 Datasheet

1750MHz Evaluation Board For PLL

=

FEATURES
Self-Contained Board including Synthesizer, VCO, Loop

Filter for generating frequencies of 1700MHz to

1800MHz
Designed for 20kHz 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 -86dBc/Hz @ 1kHz

offset

BLOCK DIAGRAM

9V BATTERY

9V BATTERY

Frequency Synthesizer

EV AL-ADF4113EB2

GENERAL DESCRIPTION

This board is designed to allow the user to evaluate the
performance of the ADF4113 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 (20kHz 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.

V

V

DD

VCO

VCO 1

(Var i-L )

VCO 190-1750T

SMA

Socket

EVAL-ADF4113EB2

PC CONNECTOR

PC CONNECTOR

POWER SWITCH

ON OFF

ADF4 113

TCXO

TCXO

Vectron

AD7706

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 01/00

© Analog Devices, Inc., 1999

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

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-ADF4113EB2

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 1750MHz RF output, 5mA CP current, VCO190­1750T, 200kHz channel spacing and 20kHz loop band­width.

Black - CLK

Red - LE

Orange - CE
White - GND

Yellow

Blue

Purple

1

14

2

15

3

16

4

17

5

18

6

19

7

20

8

21

9

22

10

23

11

24

12

25

13

25 Way Male

D-Type

To

PC Printer Port

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 ADF4113 V
default settings are 3V for the ADF4113 V
ADF4113 V

to note that the ADF4113 V
ADF4113 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 on­board. The 10 MHz TCXO from Vectron provides the
necessary Reference Input. The PLL is made up of the
ADF4113, passive loop filter (20kHz bandwidth) and the
VCO 190-1750 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 ADF4113.
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.

–2–

REV.PrA 01/00