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參數(shù)資料
| 型號： | LA7688 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Single-Chip CTV Signal-Processing Circuit for PAL and NTSC Formats |
| 中文描述： | 單芯片中視信號為PAL和NTSC處理電路格式 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 106K |
| 代理商： | LA7688 |
No. 5635-3/6
LA7688
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[Filter Block]
Filter automatic adjustment open voltage
V
9OPN
V
9TH
G
TRAP
G
BPF1
G
BPF2
G
BPF3
T
dy1
T
dy2
T
dy3
T
dy4
f
SC
= 4.43 MHz
3.3
3.8
4.3
V
S input threshold
1.5
2.0
2.5
V
C-TRAP
–20
–26
–32
dB
C-BPF1
–5
–3
–1
dB
C-BPF2
–2
–1
0
dB
C-BPF3
–6
–4
–2
dB
Y-DL TIME1
PAL
400
450
500
ns
Y-DL TIME2
NTSC
410
460
510
ns
Y-DL TIME3
S (PAL)
230
280
330
ns
Y-DL TIME4
SECAM
510
560
610
ns
[Video Block]
Contrast center
E
CCEN
dGC
1.0
1.2
1.4
Vp-p
Contrast variation range
18
22
26
dB
Brightness minimum (0.5 V)
VB min
0.4
0.7
1.0
V
Brightness typical (2.5 V)
VB typ
1.9
2.2
2.5
V
Brightness maximum (4.5 V)
VB max
3.4
3.7
4.0
V
Soft control characteristics
dG
SOFT
dG
SHARP
BW1
–6.0
–4.0
–2.0
dB
Sharp control characteristics
4.5
7.5
10.5
dB
Y signal frequency characteristics (1)
S-VHS
3.9
4.4
4.9
MHz
Y signal frequency characteristics (2)
BW2
PAL
3.0
3.35
3.7
MHz
Y signal frequency characteristics (3)
BW3
NTSC
2.5
2.85
3.2
MHz
DC transmission ratio
dVAPL
100
%
Black expansion threshold
BS
TH
BSmax
40
50
60
IRE
Black expansion maximum gain
–20
–13
–6
IRE
[Chrominance Common]
R-Y output DC voltage
V
39DC
E
39AC
V
38DC
E
38AC
V
37DC
E
37AC
E
37ALC
V
36DC
E
36AC
E
36ALC
E
CMIN
dG
CC
dVC
3.6
4.0
4.4
V
R-Y output AC voltage
0.45
0.60
0.75
Vp-p
B-Y output DC voltage
3.6
4.0
4.4
V
B-Y output AC voltage
0.35
0.5
0.65
Vp-p
R-Y input DC voltage
4.2
4.6
5.0
V
R-Y input AC voltage
0.45
0.60
0.75
Vp-p
R-Y input AC range
160
200
250
mVp-p
B-Y input DC voltage
4.2
4.6
5.0
V
B-Y input AC voltage
0.35
0.5
0.65
Vp-p
B-Y input AC range
160
200
250
mVp-p
Residual color
200
mVp-p
Contrast color amplitude characteristics
30
35
40
dB
RGB output DC difference voltage
With no chrominance signal input
–0.3
0
+0.3
V
RGB output DC voltage temperature
characteristics
VC/
T
With no chrominance signal input
0
mV/°C
RGB output residual high-frequency level
E car
0.2
Vp-p
RGB output residual carrier level
e car
With no chrominance signal input
0.3
Vp-p
fSC output pin DC voltage
V
27OPN
V
27ACP
V
27ACN
V
27LO
V
27TH
V
18PTH
V
18NTH
4.5
5.0
5.3
V
fSC output level P
PAL
0.14
0.2
0.26
Vp-p
fSC output level N
NTSC
0.19
0.26
0.33
Vp-p
DEF COIN-L
1.0
1.3
1.6
V
Crystal switching threshold
400
μA
PAL switching threshold
0.6
V
NT switching threshold
0.9
V
Continued from preceding page.
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