AD9511/PCB Analog Devices Inc, AD9511/PCB Datasheet - Page 27

• Manufacturer Part Number: AD9511/PCB
• Description: BOARD EVAL CLOCK DISTR 48LFCSP
• Manufacturer: Analog Devices Inc
• Type: Clock Distributionr

Specifications of AD9511/PCB

• Contents: Evaluation Board
• For Use With/related Products: AD9511
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PLL WITH EXTERNAL VCO AND BAND-PASS
FILTER FOLLOWED BY CLOCK DISTRIBUTION
An external band-pass filter may be used to try to improve the
phase noise and spurious characteristics of the PLL output. This
option is most appropriate to optimize cost by choosing a less
expensive VCO combined with a moderately priced filter. Note
that the BPF is shown outside of the VCO-to-N divider path,
with the BP filter outputs routed to CLK1. Some power can be
saved by shutting off unused functions, as well as by powering
down any unused clock channels (see the Register Map and
Description section).
REFERENCE
INPUT
Figure 32. AD9511 with VCO and BPF Filter
FUNCTION
SERIAL
PORT
CLK1
REFIN
V
REF
DIVIDE
DIVIDE
DIVIDE
DIVIDE
DIVIDE
R
N
AD9511
STATUS
Δ
T
PFD
LVDS/CMOS
LVDS/CMOS
LVPECL
LVPECL
LVPECL
REF
PLL
CLK2
CHARGE
PUMP
CLOCK
OUTPUTS
FILTER
LOOP
VCO
BPF
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AD9511