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AD9954/PCB Datasheet(PDF) 35 Page - Analog Devices

Part # AD9954/PCB
Description  400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
PDF  36 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9954/PCB Datasheet(HTML) 35 Page - Analog Devices

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AD9954
Rev. 0 | Page 35 of 36
SUGGESTED APPLICATION CIRCUITS
LPF
AD9954
REFCLK
RF/IF INPUT
MODULATED/
DEMODULATED
SIGNAL
Figure 29. Synchronized L.O. for Upconversion/Down Conversion
FILTER
PHASE
COMPARATOR
LOOP
FILTER
AD9954
TUNING
WORLD
REF
SIGNAL
VCO
Figure 30. Digitally Programmable Divide-by-N Function in PLL
TUNING WORD
CMOS LEVEL CLOCK
AD9954 DDS
AD9954
ON-CHIP
COMPARATOR
IOUT
IOUT
LPF
LPF
Figure 31. Frequency Agile Clock Generator
SAW
CRYSTAL
FREQUENCY
TUNING
WORD
PHASE
OFFSET
WORD 2
I/I-BAR
BASEBAND
FREQUENCY
TUNING
WORD
PHASE
OFFSET
WORD 1
Q/Q-BAR
BASEBAND
SYNC IN
AD9954 DDS
REFCLK
REFCLK
REFCLK
LPF
SYNC OUT
CRYSTAL OUT
AD9954 DDS
IOUT
IOUT
LPF
IOUT
IOUT
RF OUT
Figure 32. Two AD9954s Synchronized to Provide I and
Q Carriers with Independent Phase Offsets for Nulling



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