AD9856/PCB Analog Devices Inc, AD9856/PCB Datasheet - Page 34

• Manufacturer Part Number: AD9856/PCB
• Description: BOARD EVAL FOR AD9856
• Manufacturer: Analog Devices Inc
• Type: DDS Modulatorsr

Specifications of AD9856/PCB

• Rohs Status: RoHS non-compliant
• For Use With/related Products: AD9856
• Lead Free Status / RoHS Status: Not Compliant

AD9856
Figure 52. PCB Lay Out Pattern for Four-Layer AD9856 PCB Evaluation Board
Figure 53. PCB Lay Out Pattern for Four-Layer AD9856 PCB Evaluation Board
Layer 1 (Top)—Signal Routing and Ground Plane
Figure 56. Basic Implementation of AD9856 Digital Modulator and AD8320/AD8321 Programmable Cable Driver Amplifier
Layer 2—Ground Plane
REF CLOCK IN
DATA IN
8-20MHz
I
OUT
V
DD
I
OUT
CIU CONTROL PROCESSOR
B
QUADRATURE DIGITAL
DIRECT
CONTROL
LINES
in 5 MHz to 65 MHz HFC Return-Path Application
UPCONVERTER
AD9856
Figure 57. Equivalent I/O Circuits
CONTROL
BUS
V
Rev. C | Page 34 of 36
ENABLE AND GAIN CONTROL BUS
DD
75Ω
LP FILTER
DIGITAL
OUT
75Ω
75Ω
Figure 54. PCB Lay Out Pattern for Four-Layer AD9856 PCB Evaluation Board
Figure 55. PCB Lay Out Pattern for Four-Layer AD9856 PCB Evaluation Board
PROGRAMMABLE
CABLE DRIVER
AD8320/21
AMPLIFIER
DIGITAL
.
C
E
. A
DEMODULATOR
DOWNSTREAM
D
IN
V .
. S
S I
E
U
R
M
N
O
6
I
UPSTREAM
5
T
Layer 3—DUT +V, +5 V and 12 V Power Plane
E
TO
8
T
D
9
O
A
D
B
M
A
Layer 4 (Bottom)—Signal Routing
V
DD
TO
75Ω
CABLE
PLANT