EVAL-ADF4153EB1 Datasheet, PDF (2/8 Pages) Analog Devices – Evaluation Board For Fractional-N PLL Frequency Synthesizer

EVAL-ADF4153EB1
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.
Loop Filter Components:
Loop component values shown in the circuit diagram are
for 1.75GHz RF output, 2.5mA CP current, VCO190-
1750T VCO, 10MHz PFD frequency, 20kHz loop
bandwidth, phase margin = 45 degrees. N = 175.
On the evaluation kit CD is a copy of ADIsimPLL
software. This allows the user to create new filter designs
and model the frequency and time domain responsees of
these loops. It also has a useful report and schematic
option.
EVAL-ADF411X
EVAL-ADF421X
Figure 1. Evaluation Board Silkscreen
The board is powered from a single 9V battery. The
power supply ciruitry allows the user to choose 3V for the
ADF4153 V_DD and either 3V or 5V for the ADF4106 V_P,
and for the VCO supply. The default settings are 3V for
the ADF4153 V_DD and 5V for the ADF4153 V_P and for
the VCO supply. It is very important to note that the
ADF4153V_DD should never exceed the ADF4153 V_P. This
can damage the device.
All components necessary for LO generation are catered
for on-board. The 10MHz TCXO from Fox provides the
necessary Reference Input. The PLL is made up of the
ADF4153, passive loop filter (20kHz) and the VCO190-
1750T VCO 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.
–2–
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
White - GND
Yellow 6
18
19
7
20
8
21
9
Blue 10 ²²
23
11
24
12
Purple ₁₃
25
PC
25 Way Male
D-Type
To
PC Printer Port
ADF411X/ADF421X CABLE CONNECTIONS Rev 2 (15/3/99)
Figure 2. PC Cable Diagram
REV.PrA 03/03