ADV7170SU AD [Analog Devices], ADV7170SU Datasheet - Page 40

• Manufacturer Part Number: ADV7170SU
• Manufacturer: AD [Analog Devices]

ADV7170/ADV7171
If an output filter is required for the CVBS, Y, UV, Chroma
and RGB outputs of the ADV7170/ADV7171, the filter shown
in Figure 79 can be used. Plots of the filter characteristics are
shown in Figure 80, Figure 81 and Figure 82. An Output Filter
–10
–15
–20
–25
–30
–35
–40
–45
–50
–55
–60
–65
–70
IN
–5
0
10k
R
75
1 H
V
Figure 80. Output Filter Plot
L
dB
Figure 79. Output Filter
– OP
100k
C
470pF
2.7 H
L
FREQUENCY – Hz
C
330pF
0.68 H
1M
L
C
56pF
10M
R
75
OPTIONAL OUTPUT FILTER
OUT
100M
APPENDIX 7
–40–
is not required if the outputs of the ADV7170/ADV7171 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.
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
–4.5
–10
–15
–20
–25
–30
–35
0.0
–5
0
1
1
Figure 81. Output Filter Plot Close-Up
Filter 82. Output Filter Plot Close-Up
V
dB
V
dB
– OP
– OP
2
FREQUENCY – MHz
FREQUENCY – MHz
3
10
4
5
6
7
8
9
100
10
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