EVAL-ADF4213EB2 Datasheet, PDF (2/6 Pages) Analog Devices – 2.35GHz Dual Evaluation Board For PLL Frequency Synthesizer

EVAL-ADF4213EB2
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
61
72
83
94
5
9 Way
Female D-Type
To
ADF411X
ADF421X
Evaluation
Board
1
Black - CLK 2
14
Brown - DATA ₃
15
Red - LE ₄
16
Orange - CE ₅
17
PC
White - GND
Yellow 6
18
19
7
20
8
21
9
Blue 10 ²²
23
11
24
12
Purple ₁₃
25
25 Way Male
D-Type
To
PC Printer Port
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 chan-
nel spacing and 20kHz loop band-width.
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_DD and V_P, and for the VCO
supply. The default settings are 3V for the ADF4213 V_DD
and 5V for the ADF4213 V_P and for the VCO supply. It
is very important to note that the ADF4213 V_DD should
never exceed the ADF4213 V_P. This can damage the de-
vice.
All components necessary for LO generation are on-
board. 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