參數(shù)資料
型號(hào): AD9954YSV-REEL7
廠商: ANALOG DEVICES INC
元件分類: 數(shù)字信號(hào)處理外設(shè)
英文描述: 400 MSPS 14-Bit, 1.8 V CMOS Direct Digital Synthesizer
中文描述: DSP-NUM CONTROLLED OSCILLATOR, PQFP48
封裝: EXPOSED PAD, PLASTIC, MS-026-ABC, TQFP-48
文件頁(yè)數(shù): 35/36頁(yè)
文件大?。?/td> 1027K
代理商: AD9954YSV-REEL7
AD9954
SUGGESTED APPLICATION CIRCUITS
Rev. 0 | Page 35 of 36
0
LPF
AD9954
REFCLK
RF/IF INPUT
MODULATED/
DEMODULATED
SIGNAL
Figure 29. Synchronized L.O. for Upconversion/Down Conversion
0
FILTER
PHASE
COMPARATOR
LOOP
FILTER
AD9954
TUNING
WORLD
REF
SIGNAL
VCO
Figure 30. Digitally Programmable Divide-by-N Function in PLL
0
TUNING WORD
CMOS LEVEL CLOCK
AD9954 DDS
AD9954
ON-CHIP
COMPARATOR
IOUT
IOUT
LPF
LPF
Figure 31. Frequency Agile Clock Generator
0
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
CRYSTAL OUT
REFCLK
REFCLK
LPF
SYNC 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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