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GS1508-CTA 数据表(PDF) 6 Page - Gennum Corporation

部件名 GS1508-CTA
功能描述  HDTV Cable Driver
Download  8 Pages
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制造商  GENNUM [Gennum Corporation]
网页  http://www.gennum.com
标志 GENNUM - Gennum Corporation

GS1508-CTA 数据表(HTML) 6 Page - Gennum Corporation

  GS1508-CTA Datasheet HTML 1Page - Gennum Corporation GS1508-CTA Datasheet HTML 2Page - Gennum Corporation GS1508-CTA Datasheet HTML 3Page - Gennum Corporation GS1508-CTA Datasheet HTML 4Page - Gennum Corporation GS1508-CTA Datasheet HTML 5Page - Gennum Corporation GS1508-CTA Datasheet HTML 6Page - Gennum Corporation GS1508-CTA Datasheet HTML 7Page - Gennum Corporation GS1508-CTA Datasheet HTML 8Page - Gennum Corporation  
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6
TYPICAL APPLICATION CIRCUIT
APPLICATION INFORMATION
PCB LAYOUT
Special attention must be paid to component layout when
designing serial digital interfaces for HDTV. Figures 8
through 11 show the artwork for a four layer printed circuit
evaluation board for the GS1508. The schematic is shown in
Figure 7. An FR-4 dielectric can be used, however,
controlled impedance transmission lines are required for
PCB traces longer than approximately 1cm. Note the
following
PCB
artwork
features
used
to
optimize
performance:
PCB trace width for HD rate signals is closely matched to
SMT component width to minimize reflections due to
change in trace impedance
The PCB ground plane is removed under the GS1508
output components to minimize parasitic capacitance.
The PCB ground plane is removed under the GS1508 RSET
pin and resistor to minimize parasitic capacitance
Input and output BNC connectors are surface mounted in-
line to eliminate a transmission line stub caused by a BNC
mounting via High speed traces are curved to minimize
impedance changes due to change of PCB trace width.
TABLE 2: Typical Application Circuit Component Values
COMPONENT
VALUE
COMMENT
RSET
53.6
For 800mV Output
Z0
50
For 50
Ω PCB trace impedance
LCOMP
12nH
Typical value. Component value will vary depending on PCB layout.
CCOMP
0.5pF
Typical value. Component value will vary depending on PCB layout.
SDO
SDO
GND
VCC
SDI
SDI
VEE
RSET
53.6
Z0
Z0
0µ1
VCC
LCOMP
LCOMP
4µ7
4µ7
OUT
OUT
75
75
CCOMP
CCOMP
PECL INPUT
1n
75
75
VCC
100n
+
+
1
2
3
4
8
7
6
5
GS1508
All resistors in ohms,
all capacitors in farads,
unless otherwise shown.


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