AD8141/AD8142

Rev. 0 | Page 18 of 24

APPLICATIONS INFORMATION

DRIVING RGB VIDEO OVER CAT-5 CABLE

The AD8141 and AD8142 are devices whose foremost application

is driving RGB and component video signals over unshielded

twisted pair (UTP) cable in video distribution 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. Figure 42 shows the AD8141/AD8142 in

a triple, single-ended-to-differential application when driven from

a 75 Ω video source.

AD8141/AD8142

+

–

R

1kΩ

1kΩ

2kΩ

2kΩ

49.9Ω

49.9Ω

75Ω

38.3Ω

80.6Ω

RED

VIDEO

SOURCE

RED UTP

+

–

G

1kΩ

1kΩ

2kΩ

2kΩ

49.9Ω

49.9Ω

75Ω

38.3Ω

80.6Ω

GREEN

VIDEO

SOURCE

GREEN UTP

+

–

B

1kΩ

1kΩ

2kΩ

2kΩ

49.9Ω

49.9Ω

75Ω

38.3Ω

80.6Ω

BLUE

VIDEO

SOURCE

BLUE UTP

DISABLE

DIS

+5V

PINS

Figure 42. AD8141/AD8142 in Single-Ended-to-Differential Application on Single 5 V Supply (Sync Pulse Encoding Not Shown)