EVAL-ADF4113EB2 Datasheet, PDF (2/6 Pages) Analog Devices – 1750MHz Evaluation Board For PLL Frequency Synthesizer

EVAL-ADF4113EB2
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
Loop component values shown in the circuit diagram are
for 1750MHz RF output, 5mA CP current, VCO190-
1750T, 200kHz channel 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 ADF4113 V_DD and V_P, and for the VCO supply. The
default settings are 3V for the ADF4113 V_DD and 5V for the
ADF4113 V_P and for the VCO supply. It is very important
to note that the ADF4113 V_DD should never exceed the
ADF4113 V_P. This can damage the device.
All components necessary for LO generation are on-
board. 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 refer-
ence input. In this case, they need to insert SMA connec-
tors 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.
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REV.PrA 01/00