ANALOG DEVICES EVAL-ADF4213EB2 Service Manual

查询EVAL-ADF4213EB2供应商查询EVAL-ADF4213EB2供应商

2.35GHz Dual Evaluation Board For

=

FEATURES
Self-Contained Board including Synthesizer, RF VCO and

loop filter for generating frequencies of 2.3GHz to

2.4GHz and IF VCO and loop filter for generating fre-

quencies of 700MHz to 850MHz
Designed for 20kHz Loop Bandwidth
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.
Typical Phase Noise Performance of -83.5dBc/Hz (RF side)
@ 1kHz offset
Typical Phase Noise Performance of -90dBc/Hz (IF side) @

1kHz offset.

BLOCK DIAGRAM

9V BATTERY

V

DD

9V BATTERY

PLL Frequency Synthesizer

EV AL-ADF4213EB2

GENERAL DESCRIPTION

This board is designed to allow the user to evaluate
the performance of the ADF4213 Dual Frequency
Synthesizer for PLL's (Phase Locked Loops). The
block diagram of the board is shown below. It con­tains the ADF4213 synthesizer, a pc connector, SMA
connector for the reference input, power supplies and
RF and IF output. There is also a loop filter for both
sides (20kHz bandwidth) and an RF and IF 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

VCO

VCO1
VTUN

VCO1
FOUT

RF

OUT

REF

IN

VCO 1

(Va ri-L )

VCO 190-2350T

SMA

Socket

TCXO

Vectron 19M2

EVAL-ADF4213EB2

PC CONNECTOR

PC CONNECTOR

POWER SW ITCH

ON OFF

ADF4213

VCO 190-775T

AD7706

AD7706

VCO 2

(Va ri-L )

SMA

Socket

V

P

VCO2
VTUN

VCO2
FOUT

IF

RSET

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.

© 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-ADF4213EB2

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

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.

The RF loop component values are for a 2.35GHz output,
with 5mA CP current, VCO 190-2350T, 200kHz channel
spacing and 20kHz loop band-width.

The component values for the IF side are for a 760MHz
output, 5mA CP current, VCO190-775T, 200kHz chan­nel spacing and 20kHz loop band-width.

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 ADF4213 V
supply. The default settings are 3V for the ADF4213 V

and VP, and for the VCO

DD

DD

and 5V for the ADF4213 VP and for the VCO supply. It

is very important to note that the ADF4213 V
never exceed the ADF4213 V

. This can damage the de-

P

should

DD

vice.

All components necessary for LO generation are on­board. The 19.2 MHz TCXO from Vectron provides the
necessary Reference Input. The PLL on the RF side is
made up of the ADF4213, passive loop filter (20kHz
bandwidth) and the VCO 190-2350 from Vari-L. The
PLL on the IF consistes of the ADF4213, passive loop
filter (20kHz bandwidth) and the VCO 190-775. The
respective outputs are available at RFOUTand IFOUT
through standard SMA connectors. 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 ADF4213.

–2–

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