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

1.5k

Ω

RED

VIDEO

SOURCE

GREEN

VIDEO

SOURCE

BLUE

VIDEO

SOURCE

1.5k

Ω

AD8134

750

Ω

80.6

Ω

38.3

Ω

38.3

Ω

38.3

Ω

750

Ω

49.9

Ω

49.9

Ω

75

Ω

G

1.5k

Ω

1.5k

Ω

750

Ω

80.6

Ω

OUTPUT

PULL-DOWN

750

Ω

49.9

Ω

49.9

Ω

75

Ω

B

1.5k

Ω

1.5k

Ω

750

Ω

80.6

Ω

750

Ω

OPD

49.9

Ω

49.9

Ω

75

Ω

0.1

μF ON ALL

+5V

Figure 33. AD8134 in Single-Ended-to-Differential Application on Single 5 V Supply (Sync Pulse Encoding Not Shown)