TSH345 STMicroelectronics, TSH345 Datasheet - Page 17

• Manufacturer Part Number: TSH345
• Description: Single supply triple video buffer and selectable filter for HD and SD video applications
• Manufacturer: STMicroelectronics

TSH345
3.1
Output capacitor
The output can be either DC-coupled or AC-coupled. The output can be directly connected
to the line via a 75-Ω resistor (see
any DC components in the load. Assuming the load is 150 Ω , a coupling capacitor of 220 µF
can be used to provide a very low cut-off frequency close to 5 Hz (see
Figure 34. DC output coupling for SD, PV and HD
Figure 35. AC output coupling
1. C
2. The 75-Ω resistor must be as close as possible to the output of the driver to minimize the effect of parasitic
use of this output AC-coupling to the standard definition only.
capacitance.
S
Video
DAC
is 100 nF used to decrease the parasitic components of C in high frequencies. It is preferable to limit the
Video
DAC
Using the TSH345 to drive YC, CVBS, YUV, YPbPr and RGB video components
150
150
+5V
+5V
TSH345
TSH345
Figure
34), or an output capacitor can be used to remove
75
C=220 µF
+
75
C S
75
75
cable
cable
Figure
AM00823
35).
75
AM00822
75
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