ADV7191 datasheet(13/69 Pages) AD

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ADV7190/ADV7191

–13–

REV. 0

Table I. Luminance Internal Filter Speciﬁcations (4

Oversampling)

Passband

3 dB Bandwidth

Stopband

Filter Type

Filter Selection

Ripple

1 (dB)

(MHz)

Cutoff

3 (MHz)

Attentuation

4 (dB)

MR04 MR03 MR02

Low-Pass (NTSC)

0.16

4.24

6.05

–75.2

Low-Pass (PAL)

0.1

4.81

6.41

–64.6

Notch (NTSC)

0.09

2.3/4.9/6.6

8.03

–87.3

Notch (PAL)

0.1

3.1/5.6/6.4

8.02

–79.7

Extended (SSAF)

0.04

6.45

8.03

–86.6

CIF

0.127

3.02

5.09

–62.6

QCIF

Monotonic

1.5

3.74

–88.2

NOTES

1Passband 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.

23 dB bandwidth refers to the –3 dB cutoff frequency.

3Stopband cutoff refers to the frequency at the attenuation point referred to under Note 4.

4Stopband Attenuation refers to the attenuation point (dB) at the frequency referred to under Note 3.

Table II. Chrominance Internal Filter Speciﬁcations (4

Oversampling)

Passband

3 dB Bandwidth

Stopband

Filter Type

Filter Selection

Ripple

1 (dB)

(MHz)

Cutoff

3 (MHz)

Attentuation

4 (dB)

MR07 MR06 MR05

1.3 MHz Low-Pass

0.09

1.395

2.46

–83.9

0.65 MHz Low-Pass

Monotonic

0.65

2.41

–71.1

1.0 MHz Low-Pass

Monotonic

1.0

1.89

–64.43

2.0 MHz Low-Pass

0.048

2.2

3.1

–65.9

3.0 MHz Low-Pass

Monotonic

3.2

5.3

–84.5

CIF

Monotonic

0.65

2.41

–71.1

QCIF

Monotonic

0.5

1.75

–33.1

NOTES

1Passband 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.

23 dB bandwidth refers to the –3 dB cutoff frequency.

3Stopband cutoff refers to the frequency at the attenuation point referred to under Note 4.

4Stopband Attenuation refers to the attenuation point (dB) at the frequency referred to under Note 3.

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

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.

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

2C. The variation of frequency responses can be seen on the

following pages. For more detailed plots refer to AN-562

Analog Devices’ Application note.

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