VPX3225D データシートの表示（PDF） - Micronas
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VPX3225D Datasheet PDF : 92 Pages
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PRELIMINARY DATA SHEET
VPX 3225D, VPX 3224D
Table 2–1: ADC input range for PAL input signal and corresponding output signal ranges
Signal
Input Level [mVpp]
ADC
Range
CVBS
Chroma
100% CVBS
75% CVBS
video (luma)
sync height
clamp level
burst
100% Chroma
75% Chroma
bias level
–6 dB
667
500
350
150
0 dB
1333
1000
700
300
300
890
670
+4.5 dB
2238
1679
1175
504
[steps]
252
213
149
64
68
64
190
143
128
YCrCb
Output
Range
[steps]
–
–
224
–
16
–
128$112
128$84
128
CVBS/Y
upper headroom = 38 steps = 1.4 dB = 25 IRE
255
ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ 217
192
white
video = 100 IRE
128
Chroma
headroom = 56 steps = 2.1 dB
ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ 228
192
128
68
black
= clamp
ÍÍÍÍÍÍÍÍÍ 32
level
sync = 41 IRE
0
lower headroom = 4 steps = 0.2 dB
80
32 ÍÍÍÍÍÍÍÍÍ
Fig. 2–2: ADC ranges for CVBS/Luma and Chroma, PAL input signal
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