EVAL-ADF4208EB1 Analog Devices Inc, EVAL-ADF4208EB1 Datasheet - Page 2

• Manufacturer Part Number: EVAL-ADF4208EB1
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADF4208EB1

• Lead Free Status / Rohs Status: Not Compliant

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.
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 V
supply. The default settings are 3V for the ADF4208 V
and 5V for the ADF4208 V
is very important to note that the ADF4208 V
never exceed the ADF4208 V
vice.
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
Figure 1. Evaluation Board Silkscreen
DD
P
P
and V
and for the VCO supply. It
. This can damage the de-
P
, and for the VCO
DD
should
DD
– 2 –
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.
EVAL-ADF411X
EVAL-ADF421X
Female D-Type
6
7
8
9
Evaluation
ADF411X
ADF421X
9 Way
Board
1
2
3
4
5
To
Figure 2. PC Cable Diagram
EVAL-ADF4208EB1
Brown - DATA
White - GND
Orange - CE
Black - CLK
Red - LE
Yellow
Purple
Blue
PC Printer Port
REV.PrA 02/00
25 Way Male
10
11
12
13
1
2
3
4
5
6
7
8
9
D-Type
To
14
15
16
17
18
19
20
21
22
23
24
25
PC