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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)： | 2/6頁 |
| 文件大?。?/td> | 106K |
| 代理商： | LA7688 |
No. 5635-2/6
LA7688
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[Circuit Voltages and Currents]
Horizontal power-supply voltage
V
CC
H
I
40
I
45
Deflection system (V
24
)
6.4
6.9
7.4
V
Current drain
78
90
100
mA
34
40
48
mA
[VIF Block]
RF AGC maximum voltage
V
50H
V
50L
V
i
GR
7.5
7.8
7.8
V
RF AGC minimum voltage
0.2
0.6
V
Input sensitivity
39
45
dBμ
AGC range
56
60
dB
Maximum allowable input
V
IN max
V
8
V
8tip
V
O
V
BTH
V
BCL
S/N
95
100
dBμ
Quiescent video output voltage
4.1
4.4
4.7
V
Synchronizing signal tip voltage
1.7
2.0
2.3
V
Video output amplitude
1.7
2.0
2.3
Vp-p
Black noise threshold voltage
1.0
1.3
1.7
V
Black noise clamp voltage
2.7
3.0
3.3
V
Output signal-to-noise ratio
48
52
dB
1.07 MHz beat level
C/S
40
44
dB
Frequency characteristics
f
C
DG
6
9
MHz
Differential gain
5
10
%
Differential phase
DP
6
10
deg
Quiescent AFT voltage
V
7
V
7H
V
7L
Sf
3.6
3.9
4.2
V
Maximum AFT voltage
7.3
7.6
7.8
V
Minimum AFT voltage
0
0.3
0.7
V
AFT detection sensitivity
10
15
20
mV/kHz
k
pF
VIF input resistance
Ri
f = 38.9 MHz
1.0
1.3
1.6
VIF input capacitance
Ci
f = 38.9 MHz
2
3
5
APC pull-in range (U)
f
PU
f
PL
fU1
fL1
S
OUT
0.8
2.0
MHz
APC pull-in range (L)
–2
–0.8
MHz
VCO1 maximum variation range
0.8
2.0
MHz
–2.0
–0.8
MHz
SIF signal level
110
140
170
mVrms
VCO1 control sensitivity
2.4
4.8
9.6
kHz
[SIF Block]
SIF limiting sensitivity
V
i
(lim)
V
O
(FM)
AMR
40
46
52
dBμ
FM detector output voltage
390
500
710
mVrms
AMR
40
60
dB
Total harmonic distortion
THD
0.3
1.0
%
SIF S/N
S/N (SIF)
55
62
dB
FM detector range (L)
W
FML
W
FMH
V
O
2.5
4.0
MHz
FM detector range (H)
7.0
8.0
MHz
FM detector output variability
0
2.0
3.0
dB
[INT/EXT Switching Block]
AFT EXT gain
G
AF
THD
AF
V1
TH1
V1
TH2
V1
TH3
V1
TH4
–0.7
–0.2
+0.3
dB
AFT EXT distortion
0.03
0.5
%
System switch I-SE
Notes:
0
1.2
V
System switch I-P/N
I = INT, E = EXT
1.7
2.6
V
System switch E-P/N
P/N = PAL/NTSC
2.9
3.8
V
System switch E-SE
SE = SECAM
4.1
5
V
[Video Switching Block]
Video signal input 1 DC voltage
V
10DC
V
10AC
V
14DC
V
14AC
V
16DC
V
16AC
3.2
3.5
3.8
V
Video signal input 1 AC voltage
1.0
Vp-p
Video signal input 2 DC voltage
3.2
3.5
3.8
V
Video signal input 2 AC voltage
1.0
Vp-p
SVO pin DC voltage
2.5
2.8
3.1
V
SVO pin AC voltage
1.7
2.0
2.3
Vp-p
Operating Characteristics
at Ta = 25°C, V
CC40, 45
= 7.8 V, I
24
= 12 mA
Continued on next page.
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