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75 W

Red

Green

Blue

75 W

75 W

75 W

75 W

75 W

75 W

Monitor Output

+3.3V +1.8V

1

2

3

4

5

6

7

8

9

10

11

12

13 14 15 16 17 18 19 20 21 22 23 24

36

35

34

33

32

31

30

29

28

27

26

25

48 47 46 45 44 43 42 41 40 39 38 37

3.3V

3.3V

I C

2

2.2 m

F

2.2 m

F

0.1 m

F

1.4kW

806 W

100

100

22 pF

22 pF

V =3.3Vto5V

A

0.1 F

m

0.1 F

m

H-Syncand

V-Sync

NotUsed

P’

R

P’

B

Y’

P’

R

P’

B

Y’

Component

480i

576i

480p

576p

720p

1080i

1080p

G’B’R’

H-Sync

V-Sync

806 W

1.4kW

75 W

75 W

2.2 m

F

2.2 m

F

2.2 m

F

V

A

V

A

V

A

V

A

0.1 F

m

0.1 F

m

ADC

Scalar/

Decoder

THS7347

THS7347

SLOS531 – MAY 2007

APPLICATIONS INFORMATION (continued)

R'G'B' (commonly labeled RGB) is also called G'B'R' (again commonly labeled as GBR) in professional video

systems. The SMPTE component standard stipulates that the luma information is placed on the first channel, the

blue color difference is placed on the second channel, and the red color difference signal is placed on the third

sync information and the green channel (G') also carries the sync information, it makes logical sense that G' be

signal on the third channel, respectively. Thus, hardware compatibility is better achieved when using G'B'R'

rather than R'G'B'. Note that for many G'B'R' systems, sync is embedded on all three channels; this

configuration may not always be the case for all systems.

(1)

Inputs and/or outputs can be ac- or dc-coupled if desired.

(2)

H-Sync and V-Sync input resistance as shown above = 2.2k

Ω, but may be changed to any desired resistance.

(3)

If the Monitor or Buffer PCB trace is >25 mm, it is recommended to place at least a 10-

Ω resistor in series with each

signal to reduce PCB parasitic issues

15

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