ADV7190/ADV7191
Each DAC can be individually powered off if not required. A
complete description of DAC output configurations is given in
the MR2 Bit Description section.
Video output levels are illustrated in Appendix 9.
INTERNAL FILTER RESPONSE
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
I
2
C. The variation of frequency responses can be seen on the
following pages. For more detailed plots refer to AN-562
Analog Devices’ Application note.
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 five low-pass
responses, a CIF response and a QCIF response, as can be seen on
the following pages.
Table I. Luminance Internal Filter Specifications (4
Oversampling)
Filter Type
Low-Pass (NTSC)
Low-Pass (PAL)
Notch (NTSC)
Notch (PAL)
Extended (SSAF)
CIF
QCIF
Filter Selection
MR04
0
0
0
0
1
1
1
MR03
0
0
1
1
0
0
1
MR02
0
1
0
1
0
1
0
Passband
Ripple
1
(dB)
0.16
0.1
0.09
0.1
0.04
0.127
Monotonic
3 dB Bandwidth
2
(MHz)
4.24
4.81
2.3/4.9/6.6
3.1/5.6/6.4
6.45
3.02
1.5
Stopband
Cutoff
3
(MHz)
6.05
6.41
8.03
8.02
8.03
5.09
3.74
Stopband
Attentuation
4
(dB)
–75.2
–64.6
–87.3
–79.7
–86.6
–62.6
–88.2
NOTES
1
Passband ripple is defined to be fluctuations from the 0 dB response in the passband, measured in (dB). The passband is defined to have 0-fc frequency limits for a
low-pass filter, 0–f1 and f2–infinity for a notch filter, where fc, f1, f2 are the –3 dB points.
2
3 dB bandwidth refers to the –3 dB cutoff frequency.
3
Stopband cutoff refers to the frequency at the attenuation point referred to under Note 4.
4
Stopband Attenuation refers to the attenuation point (dB) at the frequency referred to under Note 3.
Table II. Chrominance Internal Filter Specifications (4
Oversampling)
Filter Type
1.3 MHz Low-Pass
0.65 MHz Low-Pass
1.0 MHz Low-Pass
2.0 MHz Low-Pass
3.0 MHz Low-Pass
CIF
QCIF
Filter Selection
MR07
0
0
0
0
1
1
1
MR06
0
0
1
1
0
0
1
MR05
0
1
0
1
0
1
0
Passband
Ripple
1
(dB)
0.09
Monotonic
Monotonic
0.048
Monotonic
Monotonic
Monotonic
3 dB Bandwidth
2
(MHz)
1.395
0.65
1.0
2.2
3.2
0.65
0.5
Stopband
Cutoff
3
(MHz)
2.46
2.41
1.89
3.1
5.3
2.41
1.75
Stopband
Attentuation
4
(dB)
–83.9
–71.1
–64.43
–65.9
–84.5
–71.1
–33.1
NOTES
1
Passband ripple is defined to be fluctuations from the 0 dB response in the passband, measured in (dB). The passband is defined to have 0-fc frequency limits for a
low-pass filter, 0–f1 and f2–infinity for a notch filter, where fc, f1, f2 are the –3 dB points.
2
3 dB bandwidth refers to the –3 dB cutoff frequency.
3
Stopband cutoff refers to the frequency at the attenuation point referred to under Note 4.
4
Stopband Attenuation refers to the attenuation point (dB) at the frequency referred to under Note 3.
REV. 0
–13–
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