TSH345

Using the TSH345 to drive Y-C, CVBS, Y-U-V, Y-Pb-Pr and R-G-B video components

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4

and R-G-B video components

Figure 2.

Implementation of the video driver on output video DACs

Figure 3.

Shapes of video signals coming from DACs (example for a black picture)

+5V

75

Ω

75

Ω Cable

75

Ω

1Vpp

1Vpp

2Vpp

1Vpp

1Vpp

Video

DAC

LPF

Reconstruction

Filtering

Y

75

Ω

75

Ω Cable

75

Ω

Video

DAC

Pb

75

Ω

Video

DAC

Pr

TV

TSH345

75

Ω Cable

75

Ω

+6dB

+

+

LPF

Reconstruction

Filtering

+6dB

+

+

LPF

Reconstruction

Filtering

+6dB

+

+

0.7Vpp

0.7Vpp

1.4Vpp

1.4Vpp

0.7Vpp

0.7Vpp

0.7Vpp

0.7Vpp

1.4Vpp

1.4Vpp

0.7Vpp

0.7Vpp

-5V

GND

GND

590ns

(44t)

27ns

(2t)

54ns

(4t)

27ns

(2t)

590ns

(44t)

300mV

300mV

HD

Black (30IRE)

14.8us (1100t): 1920/1080i

24.3us (1800t): 1280/720i

•Fclock=74.25MHz

•t=1/Fclock=13.5ns

SD

GND

4.6us

160ns

300mV

Black (30IRE)

64us

150ns

sync.tip

sync.tip