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ADV7172 데이터시트(PDF) 11 Page - Analog Devices |
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ADV7172 데이터시트(HTML) 11 Page - Analog Devices |
11 / 59 page ADV7172/ADV7173 –11– REV. A FILTER TYPE FILTER SELECTION PASSBAND RIPPLE (dB) 3 dB BANDWIDTH (MHz) STOPBAND CUTOFF (MHz) STOPBAND ATTENUATION (dB) MR04 0 0 0 0 1 1 1 MR03 0 0 1 1 0 0 1 MR02 0 1 0 1 0 1 0 LOW-PASS (NTSC) LOW-PASS (PAL) NOTCH (NTSC) NOTCH (PAL) EXTENDED (SSAF) CIF QCIF 0.091 0.15 0.015 0.095 0.051 0.018 MONOTONIC 4.157 4.74 6.54 6.24 6.217 3.0 1.5 7.37 7.96 8.3 8.0 8.0 7.06 7.15 –56 –64 –68 –66 –61 –61 –50 Figure 4. Luminance Internal Filter Specifications FILTER TYPE FILTER SELECTION PASSBAND RIPPLE (dB) 3 dB BANDWIDTH (MHz) STOPBAND CUTOFF (MHz) STOPBAND ATTENUATION (dB) MR07 0 0 0 0 1 1 1 MR06 0 0 1 1 0 0 1 MR05 0 1 0 1 0 1 0 1.3 MHz LOW PASS 0.65 MHz LOW PASS 1.0 MHz LOW PASS 2.0 MHz LOW PASS RESERVED CIF QCIF 0.084 MONOTONIC MONOTONIC 0.0645 0.084 MONOTONIC 1.395 0.65 1.0 2.2 0.7 0.5 3.01 3.64 3.73 5.0 3.01 4.08 –45 –58.5 –49 –40 –45 –50 Figure 5. Chrominance Internal Filter Specifications FREQUENCY – MHz 0 012 2 46 8 10 –10 –20 –30 –50 –60 –40 –70 Figure 6. NTSC Low-Pass Luma Filter FREQUENCY – MHz 0 012 2 46 8 10 –10 –20 –30 –50 –60 –40 –70 Figure 7. PAL Low-Pass Luma Filter INTERNAL FILTER RESPONSE The Y Filter supports several different frequency responses, including two low-pass responses, two notch responses, an Ex- tended (SSAF) response with or without gain boost/attenuation, a CIF response and a QCIF response. The UV Filter supports several different frequency responses, including four low-pass responses, a CIF response and a QCIF response. These can be seen in Figures 4 to 18. 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 2C. The variation of frequency responses can be seen in Figures 19 to 21. (continued from page 2) |
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