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AD9873JS 데이터시트(PDF) 20 Page - Analog Devices

부품명 AD9873JS
상세설명  Analog Front End Converter for Set-Top Box, Cable Modem
PDF  39 Pages
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제조업체  AD [Analog Devices]
홈페이지  http://www.analog.com
Logo AD - Analog Devices

AD9873JS 데이터시트(HTML) 20 Page - Analog Devices

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REV. 0
AD9873
–20–
THEORY OF OPERATION
To gain a general understanding of the AD9873 it is helpful
to refer to Figure 1, which displays a block diagram of the device
MUX
8
8
10
12
AD9873
I INPUT
Q INPUT
IF10 INPUT
IF12 INPUT
VIDEO INPUT
ADC
ADC
ADC
ADC
DAC
2
(fOSCIN)
2
(fOSCIN)
2
MUX
MUX
REF-8
REF-10
REF-12
CLAMP LEVEL
12
CONTROL WORD 0
12
CONTROL WORD 1
OSC IN
MULTIPLIER
M
M = 1,2,.......,31
DAC
12
MUX
INV
SINC
SIN
COS
DDS
12
12
12
12
12
12
2
2
R
N
8
R = 2,3,.......,63
N = 3,4
(fMCLK)(fIQCLK)
I
Q
6
DATA
ASSEMBLER
HALF-BAND
FILTER #1
HALF-BAND
FILTER #2
CIC
FILTER
QUADRATURE
MODULATOR
AD832x CTRL
BURST PROFILE
CTRL
SERIAL
INTERFACE
3
2
4
Rx - ITF
SDELTA1
SDELTA0
OSC IN
XTAL
Tx
FSADJ
Tx IQ
Tx SYNC
MCLK
REF CLK
Rx IQ
Rx SYNC
Rx IF
INV SINC
BYPASS
(fOSCIN)
(fSYSCLK)
4
12
-
-
Figure 1. Block Diagram
architecture. The following is a general description of the device
functionality. Later sections will detail each of the data path build-
ing blocks.



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