ADV7194 datasheet(13/69 Pages) AD

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ADV7194

–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 of the attenuation point referred to in Note 4.

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

Table II. Chrominance Internal Filter Speciﬁcations (4

Oversampling)

Passband

3 dB Bandwidth2

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 of the attenuation point referred to in Note 4.

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

When used to interface progressive scan systems, the ADV7194

allows input to YCrCb signals in Progressive Scan format (3

× 10

bit) before these signals are routed to the interpolation ﬁlters

and the DACs.

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 in

the following ﬁgures.

In Extended Mode there is the option of 12 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

2C. The

variation of frequency responses can be seen in the tables on

the following pages.

For a more detailed filter specification, refer to Analog Devices’

application note AN-562.

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