TSH173 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TSH173

Triple video buffer with filter for SD video

STMicroelectronics 

Electrical characteristics

TSH173

3.1

Synchronization tip

The TSH173, in single 0/5V supply, is designed to drive the video signal on the line without

any damage to the synchronization tip. This is achieved by a small internal DC shift and a

very low output rail. The DAC offset, as shown in Figure 18, can be as low as 0V.

Nevertheless, in order to minimize the DC component on the line, the output can be AC

coupled by a capacitor (Figure 20).

Figure 18. Input signal

160ns 150ns

300mV

DAC offset

4.6µs

Synchronization tip

64µs

Black (30 IRE)

(0 IRE)

GND

Figure 19. DC coupled output configuration

Video

DAC

TSH173

Vin

75Ω 75Ω Cable

75Ω Vout

Figure 20. AC coupled output configuration

Video

DAC

TSH173

Vin

220µF 75Ω 75Ω Cable

75Ω Vout

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