adv7174 Analog Devices, Inc., adv7174 Datasheet - Page 49

• Manufacturer Part Number: adv7174
• Description: Chip Scale Pal/ntsc Video Encoder With Advanced Power Management
• Manufacturer: Analog Devices, Inc.

APPENDIX 7—OPTIONAL OUTPUT FILTER
If an output filter is required for the CVBS, Y, UV, chroma, and
RGB outputs of the ADV7174/ADV7179, the filter shown in
Figure 79 can be used. Plots of the filter characteristics are
shown in Figure 80. An output filter is not required if the
outputs of the ADV7174/ADV7179 are connected to most
analog monitors or analog TVs. However, if the output signals
are applied to a system where sampling is used (e.g., digital
TVs), then a filter is required to prevent aliasing.
FILTER I/P
75:
270pF
Figure 79. Output Filter
1.8PH
22pF
330pF
Z
0
= 75:
DISPLAY DEVICE
75:
Rev. A | Page 49 of 52
50
10
20
30
40
60
70
80
0
100k
Figure 80. Output Filter Plot
1M
FREQUENCY (Hz)
ADV7174/ADV7179
10M
100M