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參數資料
| 型號： | LA7674 |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP52 |
| 封裝： | SDIP-52 |
| 文件頁數： | 3/6頁 |
| 文件大小： | 95K |
| 代理商： | LA7674 |
No. 4361-3/6
LA7674
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[Audio-visual Switches]
Video sutput DC voltage
V38
Quiescent
3.0
3.4
3.8
V
Internal video input voltage
V42
Quiescent
4.4
4.8
5.2
V
External video input voltage
V40
Quiescent
4.4
4.8
5.2
V
External audio input voltage
V3
Quiescent
5.2
5.6
6.0
V
[SIF AF]
SIF limiting voltage
Vi lim
SIF output level for detection output at –3dB
33
40
47
dB
FM detection output voltage
VO1
Vi = 100dB,
f = ±25kHz
440
550
670
mVrms
FM detection output distortion ratio
THD
Vi = 100dB,
f = ±25kHz
0
0.4
1.0
%
AM rejection
AMR
Vi = 100dB,
FM :
f = ±25kHz
40
60
80
dB
AM : 30 %
AF amplifier voltage gain
GAF
Vi = 100mVrms, f = 400Hz
18
20
22
dB
AF maximum output voltage
VO6 max
Output level for AF amplifier
2.0
2.8
3.6
Vrms
output distortion at 10%
AF electronic attenuator range
ATT
Vi = 200mVrms, f = 400Hz
70
80
100
dB
[Video]
Black enhancement threshold
BSTH
APL variable
40
50
60
IRE
Maximum black enhancement gain
BS max
APL variable
–35
–27
–20
IRE
Soft video tone variable range
Soft
f = 2MHz, 100mVp-p
–6
–4
–2
dB
video tone VR: 4V
→ 0V
Sharp video tone variable range
Sharp
f = 2MHz, 100mVp-p
71013
dB
video tone VR: 4V
→ 9V, contrast VR: 6V
Video voltage gain audio-visual
GV9V
f = 100kHz, 100mVp-p, contrast VR: 9V,
15
18
21
dB
Switch 9V
video tone VR: 4V
Video voltage gain audio-visual
GV0V
f = 100kHz, 100mVp-p, contrast VR: 0V,
15
18
21
dB
Switch 0V
video tone VR: 4V
Contrast control center
CCEN
f = 100kHz, 100mVp-p, contrast
0.4
0.48
0.57
Vp-p
VR: 6V
Contrast variable control range
CV
Contrast VR: 3V
→ 9V
18
20
22
dB
B RH
Bright VR: 2V
5.5
6.5
7.5
V
Bright control
B RCEN
Bright VR: 4.5V
3.1
3.6
4.1
V
B RL
Bright VR: 7.5V
0.3
1.2
V
D.L. off frequency characteristics
fV 9V
Contrast VR: 6V, video tone
7
9
MHz
VR: 4V, 3dB down
D.L. on frequency characteristics
fV 0V
Contrast VR: 6V, video tone
2.5
3
4
MHz
VR: 4V, 3dB down
DC transmission
RDC
Input: stair step signal, 500mVp-p
100
103
106
%
Delay line delay
TDL
Input: white 100%
290
340
390
ns
[Chroma]
ACC amplitude characteristics
ACC1
+6dB
–3
0
+3
dB
ACC2
–20dB
–7
0
+2
dB
ACC phase characteristics
ACCP1
+6dB
–3
0
+3
°C
ACCP2
–20dB
–7
0
+7
°C
Killer operation point
EK
–35
–28
–21
dB
Color control color residual
EC min
Color VR: 0V, contrast VR: 9V
50
mVp-p
Color control center
EC CEN
Color VR: 4.5V, contrast VR: 6V
1.2
1.8
2.4
Vp-p
Maximum demodulation output
EC max
Color VR: 9V, contrast VR: 9V
3.2
4.0
4.8
Vp-p
Color contrast variable range
CC
Color VR: B – Y = 2.5Vp-p,
17.5
19.5
21.5
dB
contrast VR: 3V
→ 9V
Tint control center
TCEN
Tint VR: 4.5V, color VR: 4.5V,
01224
°C
contrast VR: 6V
Tint variable range
T
Tint VR: 0V
←4.5V → 8V,
±40
±55
±70
°C
color VR: 4.5V, contrast VR: 6V
APC pull-in range
fAPC
±300
±500
Hz
Continued on next page.
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