Evaluation Board User Guide
UG-171
One
Technology
Way
•
P.O.
Box
9106
•
Norwood,
MA
02062-9106,
U.S.A.
•
Tel:
781.329.4700
•
Fax:
781.461.3113
•
www.analog.com
Evaluation Board for Fractional-N PLL Frequency Synthesizer
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Rev. A | Page 1 of 8
FEATURES
Self-contained board, including
Synthesizer
VCO
10 MHz TCXO for reference frequency
Loop filter (5.8 GHz)
Designed for
10 MHz PFD frequency
200 kHz channel spacing
Minimum charge pump current
20 kHz loop bandwidth
Accompanying software allows complete control of
synthesizer function from a PC
Battery operated: choice of 3 V or 5 V supply
Typical phase noise performance of −85 dBc/Hz at 1 kHz
offset from a 5.8 GHz carrier
GENERAL DESCRIPTION
This board allows the user to evaluate the performance of the
ADF4156 frequency synthesizer for PLLs (phase-locked loops).
A block diagram of the evaluation board is shown in Figure 1. It
contains the ADF4156 synthesizer, a PC connector, and SMA
connectors for the power supplies and RF output. There is also a
low-pass loop filter (20 kHz) and a VCO (Z-COMM
V940ME03-LF 5.8 GHz) on board.
The evaluation board is set up for a 10 MHz PFD comparison
frequency. An on-board TCXO provides the 10 MHz reference
frequency. 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.
FUNCTIONAL BLOCK DIAGRAM
VCO
PC CONNECTOR
9V BATTERY
ADF4156
EVAL-ADF4156EBZ1
CE
TCXO
POWER SWITCH
ON
OFF
FILTER
SMA
SOCKET
REF
IN
MUXOUT
V
P
V
DD
V
VCO
TEST
TEST
RF
OUT
09173-
001
Figure 1.
