Datasheet

AD8134
Rev. A | Page 15 of 20
APPLICATIONS
DRIVING RGB VIDEO OVER CAT-5 CABLE
The AD8134 is a device whose foremost application is driving
RGB video signals over UTP cable in KVM networks. Single-
ended video signals are easily converted to differential signals
for transmission over the cable, and the internally fixed gain of
2 automatically compensates for the losses incurred by the
source and load terminations. The AD8134 can be used in all of
the typical KVM network topologies, including daisy-chained,
star, and point-to-point.
Figure 33 shows the AD8134 in a
triple, single-ended-to-differential application in a daisy-
chained network when driven from a 75 Ω video source.
UTP R
UTP G
UTP B
R
1.5kΩ
RED
VIDEO
SOURCE
GREEN
VIDEO
SOURCE
BLUE
VIDEO
SOURCE
1.5kΩ
AD8134
750Ω
80.6Ω
38.3Ω
38.3Ω
38.3Ω
750Ω
49.9Ω
49.9Ω
75Ω
G
1.5kΩ
1.5kΩ
750Ω
80.6Ω
OUTPUT
PULL-DOWN
750Ω
49.9Ω
49.9Ω
75Ω
B
1.5kΩ
1.5kΩ
750Ω
80.6Ω
750Ω
OPD
49.9Ω
49.9Ω
75Ω
0.1μF ON ALL
V
S+
PINS
+5V
V
S+
V
S–
04770-002
Figure 33. AD8134 in Single-Ended-to-Differential Application on Single 5 V Supply (Sync Pulse Encoding Not Shown)