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AD9854ASVZ Datasheet(PDF) 16 Page - Analog Devices

Part # AD9854ASVZ
Description  CMOS 300 MSPS Quadrature Complete DDS
PDF  52 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9854ASVZ Datasheet(HTML) 16 Page - Analog Devices

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AD9854
Rev. E | Page 16 of 52
TYPICAL APPLICATIONS
LPF
REFCLK
RF/IF
INPUT
I BASEBAND
COS
LPF
LPF
AD9854
Q BASEBAND
LPF
SIN
CHANNEL
SELECT
FILTERS
Figure 25. Quadrature Downconversion
LPF
REFCLK
COS
LPF
AD9854
SIN
RF OUTPUT
I BASEBAND
Q BASEBAND
Figure 26. Direct Conversion Quadrature Upconverter
I
Q
Rx
RF IN
DUAL
8-/10-BIT
ADC
DIGITAL
DEMODULATOR
Rx BASEBAND
DIGITAL DATA
OUT
8
8
I/Q MIXER
AND
LOW-PASS
FILTER
VCA
ADC ENCODE
ADC CLOCK FREQUENCY
LOCKED TO Tx CHIP/
SYMBOL/PN RATE
REFERENCE
CLOCK
48
CHIP/SYMBOL/PN
RATE DATA
AD9854
CLOCK
GENERATOR
AGC
Figure 27. Chip Rate Generator in Spread Spectrum Application
50Ω
BAND-PASS
FILTER
50Ω
IOUT
AD9854
FUNDAMENTAL
FC –FO
IMAGE
FCLK
FC +FO
IMAGE
BAND-PASS
FILTER
FC +FO
IMAGE
AD9854
SPECTRUM
FINAL OUTPUT
SPECTRUM
AMPLIFIER
Figure 28. Using an Aliased Image to Generate a High Frequency



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