Analog Devices ADF4213EB2 Datasheet
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
REV.PrA 01/00
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: 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-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–
REV.PrA 01/00
Loading...