ADV7330KST datasheet(35/76 Pages) AD

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REV. B

ADV7330

–35–

Table VI. Internal Filter Specifications

Pass-Band Ripple 3 dB Bandwidth

Filter

(dB)

(MHz)

Luma LPF NTSC

0.16

4.24

Luma LPF PAL

0.1

4.81

Luma Notch NTSC

0.09

2.3/4.9/6.6

Luma Notch PAL

0.1

3.1/5.6/6.4

Luma SSAF

0.04

6.45

Luma CIF

0.127

3.02

Luma QCIF

Monotonic

1.5

Chroma 0.65 MHz

Monotonic

0.65

Chroma 1.0 MHz

Monotonic

Chroma 1.3 MHz

0.09

1.395

Chroma 2.0 MHz

0.048

2.2

Chroma 3.0 MHz

Monotonic

3.2

Chroma CIF

Monotonic

0.65

Chroma QCIF

Monotonic

0.5

NOTES

1Pass-band ripple refers to the maximum fluctuations from the 0 dB response in

the pass band, measured in (dB). The pass band is defined to have 0 (Hz) to

fc (Hz) frequency limits for a low-pass filter, 0 (Hz) to f1 (Hz) and f2 (Hz) to

infinity for a notch filter, where fc, f1, f2 are the –3 dB points.

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

FREQUENCY (MHz)

–10

–30

–50

–60

–20

–40

EXTENDED UV FILTER MODE

Figure 29. UV SSAF Filter

SD Internal Filter Response

[Subaddress 40h; Subaddress 42, Bit 0]

The Y filter supports several different frequency responses includ-

ing 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 six low-pass responses,

aCIF response, and a QCIF response, as can be seen in the

typical performance characteristics graphs on the following pages.

If SD SSAF gain is enabled, there is the option of 12 responses in

the range of –4 dB to +4 dB [Subaddress 47, Bit 4]. The desired

response can be chosen by the user by programming the correct

value via the I

2C [Subaddress 62h]. The variation of frequency

responses can be seen in the typical performance characteristics

graphs on the following pages.

In addition to the chroma filters listed in Table VI, the ADV7330

contains an SSAF filter specifically designed for and applicable

to the color difference component outputs, U and V.

This filter has a cutoff frequency of about 2.7 MHz and –40 dB

at 3.8 MHz, as can be seen in Figure 29. This filter can be

controlled with Address 42h, Bit 0.

If this filter is disabled, the selectable chroma filters shown in

Table VI can be used for the CVBS or chroma signal.

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