參數(shù)資料
型號(hào)： ADV7321KSTZ
廠商： Analog Devices Inc
文件頁數(shù)： 43/88頁
文件大?。?/td> 0K
描述： IC VID ENC 6-12BIT DAC'S 64LQFP
標(biāo)準(zhǔn)包裝： 1
類型： 視頻編碼器
應(yīng)用： EVD，DVD，SD/PS/HDTV
電壓 - 電源，模擬： 2.5V
電壓 - 電源，數(shù)字： 2.5V
安裝類型： 表面貼裝
封裝/外殼： 64-LQFP
供應(yīng)商設(shè)備封裝： 64-LQFP（10x10）
包裝： 托盤
ADV7320/ADV7321
Rev. A | Page 48 of 88
FILTERS
Table 27 shows an overview of the programmable filters available
on the ADV7320/ADV7321.
Table 27. Selectable Filters
Filter
Subaddress
SD Luma LPF NTSC
0x40
SD Luma LPF PAL
0x40
SD Luma Notch NTSC
0x40
SD Luma Notch PAL
0x40
SD Luma SSAF
0x40
SD Luma CIF
0x40
SD Luma QCIF
0x40
SD Chroma 0.65 MHz
0x40
SD Chroma 1.0 MHz
0x40
SD Chroma 1.3 MHz
0x40
SD Chroma 2.0 MHz
0x40
SD Chroma 3.0 MHz
0x40
SD Chroma CIF
0x40
SD Chroma QCIF
0x40
SD UV SSAF
0x42
HD Chroma Input
0x13
HD Sinc Filter
0x13
HD Chroma SSAF
0x13
SD Internal Filter Response
[Subaddress 0x40 [7:2]; Subaddress 0x42, Bit 0]
The Y filter supports several 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 six low-pass responses, a CIF
response, and a QCIF response, as shown in Figure 35 and
If SD SSAF gain is enabled, there are 12 response options in the
range 4 dB to +4 dB [Subaddress 0x47, Bit 4]. Choose the
desired response by programming the correct value via the I2C
[Subaddress 0x62]. The variation of frequency responses are
In addition to the chroma filters listed in Table 27, the
ADV7320/ADV7321 contain an SSAF filter specifically
designed for the color difference component outputs, U and V.
This filter has a cutoff frequency of about 2.7 MHz and a gain of
–40 dB at 3.8 MHz, as shown in Figure 66. This filter can be
controlled with Address 0x42, Bit 0.
FREQUENCY (MHz)
0
GAIN
(
d
B)
–10
–30
–50
–60
–20
–40
6
5
4
3
2
1
0
05067-044
EXTENDED UV FILTER MODE
Figure 66. UV SSAF Filter
If this filter is disabled, one of the chroma filters shown in
Table 28 can be selected and used for the CVBS or luma/
chroma signal.
Table 28. Internal Filter Specifications
Filter
Pass-Band
Ripple1 (dB)
3 dB Bandwidth2
(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
1
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
1 Pass-band ripple is the maximum fluctuation from the 0 dB response in the
pass band. The pass band is defined to have 0 Hz to fc (Hz) frequency limits
for a low-pass filter, and 0 Hz to f1 (Hz) and f2 (Hz) to infinity for a notch filter,
where fc, f1, and f2 are the 3 dB points.
2 3 dB bandwidth refers to the 3 dB cutoff frequency.
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