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ADV7172 View Datasheet(PDF) - Analog Devices

Part NameDescriptionManufacturer
ADV7172 Digital PAL/NTSC Video Encoder with Six DACs (10 Bits), Color Control and Enhanced Power Management ADI
Analog Devices ADI
ADV7172 Datasheet PDF : 60 Pages
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(continued from page 2)
INTERNAL FILTER RESPONSE
The Y Filter supports several different frequency responses,
including two low-pass responses, two notch responses, an
Extended (SSAF) response with or without gain boost/attenuation,
a CIF response and a QCIF response. The UV Filter supports
several different frequency responses, including four low-pass
responses, a CIF response and a QCIF response. These can be
seen in Figures 4 to 18.
ADV7172/ADV7173
In Extended Mode there is the option of twelve responses
in the range from –4 dB to +4 dB. The desired response can
be chosen by the user by programming the correct value via
the I2C. The variation of frequency responses can be seen in
Figures 19 to 21.
FILTER TYPE
LOW-PASS (NTSC)
LOW-PASS (PAL)
NOTCH (NTSC)
NOTCH (PAL)
EXTENDED (SSAF)
CIF
QCIF
PASSBAND RIPPLE 3 dB BANDWIDTH STOPBAND
STOPBAND
FILTER SELECTION
(dB)
(MHz)
CUTOFF (MHz) ATTENUATION (dB)
MR04 MR03 MR02
0
0
0
0.091
4.157
7.37
–56
0
0
1
0.15
4.74
7.96
–64
0
1
0
0.015
6.54
8.3
–68
0
1
1
0.095
6.24
8.0
–66
1
0
0
0.051
6.217
8.0
–61
1
0
1
0.018
3.0
7.06
–61
1
1
0
MONOTONIC
1.5
7.15
–50
Figure 4. Luminance Internal Filter Specifications
FILTER TYPE
1.3MHz LOW PASS
0.65MHz LOW PASS
1.0MHz LOW PASS
2.0MHz LOW PASS
RESERVED
CIF
QCIF
PASSBAND RIPPLE 3 dB BANDWIDTH STOPBAND
STOPBAND
FILTER SELECTION
(dB)
(MHz)
CUTOFF (MHz) ATTENUATION (dB)
MR07 MR06 MR05
0
0
0
0.084
1.395
3.01
0
0
1
MONOTONIC
0.65
3.64
0
1
0
MONOTONIC
1.0
3.73
0
1
1
0.0645
2.2
5.0
1
0
0
1
0
1
0.084
0.7
3.01
1
1
0
MONOTONIC
0.5
4.08
45
58.5
49
40
45
50
Figure 5. Chrominance Internal Filter Specifications
0
10
20
30
40
50
60
70
0
2
4
6
8
10
12
FREQUENCY MHz
Figure 6. NTSC Low-Pass Luma Filter
0
10
20
30
40
50
60
70
0
2
4
6
8
10
12
FREQUENCY MHz
Figure 7. PAL Low-Pass Luma Filter
REV. B
–11–
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