Application information

TSH344

10/17

3

Application information

3.1

Using the TSH344 to drive R-G-B video components

Figure 25.

Shapes of video signals coming from DACs

Figure 26.

TSH344 in single supply for HD

Note:

See the TSH343 datasheet on st.com for more information (the TSH343 is used to drive a

video signal including a synchronization tip).

10mV

GND

590ns

(44t)

27ns

(2t)

54ns

(4t)

27ns

(2t)

590ns

(44t)

300mV

300mV

Black (30 IRE)

14.8µs (1100t): 1920*1080i

24.3µs (1800t): 1280*720i

•Fclock=74.25MHz

•t=1/Fclock=13.5ns

Synchronization tip

(0 IRE)

White (100 IRE)

0.030V

0.330V

1.030V

700mV

time

Frequency

Amplitude

30MHz

1Vp-p

Pb,B

video

outputs

LPF

LPF

LPF

Cable

Cable

Cable

+5V

75

Ω

75

Ω

75

Ω

TSH344

SO8

DAC

DAC

DAC

Pr,R

G

video

outputs

LPF

LPF

LPF

Cable

Cable

Cable

+5V

75

Ω

75

Ω

75

Ω

TSH343

SO8

R

DAC

DAC

DAC

B

HDTV

Digital synchro