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參數(shù)資料
| 型號： | LA71578HM |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | 14 X 20 MM, QIP-100 |
| 文件頁數(shù)： | 3/43頁 |
| 文件大小： | 1533K |
| 代理商： | LA71578HM |
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LA71598HM
No.A0643-11/44
Continued from preceding page.
Ratings
Parameter
Symbol
In
Out
Conditions
min
typ
max
Unit
Recording mode
T87: 5.0V
T30: 5.0V
T11B
HA
Current dissipation
IHCCR
Pin 87 inflow current.
0
48
mA
REC AGC Amp output
current
VRSP
VREP
T12A
T89A
T83A
Output level when VIN = 300mVp-p, f = 4MHz
0
5.0
12.7
13.5
14.3
mAp-p
REC AGC AMP
control characteristics
1
ΔVAGC1-SP
ΔVAGC1-EP
T12A
T89A
T83A
As f = 4MHz, the output level/VRSP, EP
When VIN = 700mVp-p.
0
5.0
0.5
dB
REC AGC AMP
control characteristics
2
ΔVAGC2-SP
ΔVAGC2-EP
T12A
T89A
T83A
As f = 4MHz, the output Level/VRSP, EP
when VIN = 100mVp-p.
5.0
-0.5
dB
REC AGC AMP
Frequency
characteristics
ΔVFRS
ΔVFRE
T12A
T89A
T83A
As VIN = 300mVp-p, the output ratio when f is 1M,
7MHz 7MHz/1MHz
(Note 1)
0
5.0
0.0
dB
REC AGC AMP
second harmonic
distortion
ΔVHDRS
ΔVHDRE
T12A
T89A
T83A
15mAp-p/ each head
The ratio of the 8M (second component)
VIN = 300mVp-p, f = 4MHz output and 4M
(first component).
0
5.0
-40
-36
dB
REC AGC AMP
maximum output level
ΔVHDRS
ΔVHDRE
T12A
T89A
T83A
The output level which become -35dB of f = 4MHz
second distortion.
0
5.0
2.0
mAp-p
REC AGC AMP
attenuate volume of
mute
ΔVMRS
ΔVMRE
T12A
T89A
T83A
Output level/VRSP, EP
When VIN = 300mVp-p, f = 4MHz via pin 30
0
5.0
-45
dB
REC AGC AMP
Mixed modulation
relative level
ΔVCYS
ΔVCYE
T12A,
T71A
T89A
T83A
T12A: VIN = 300mVp-p, f = 4MHz,
T71A: VIN = 1.5Vp-p, f = 629kHz
(4M±629K)/4M ratio of output
0
5.0
-40
dB
Similarly to the case of the PB mode, HA-SW (EP/SP) changeover is synchronized to rise of H-SYNC in the REC mode.
Before changeover,
Check by applying the video signal (1Vp-p) to T38A if H-SYNC is correctly output to T28.
(Note1) Apply about 1.8 DC volt to the AGC detection filter pin (pin92) to fix AGC-AMP-GAIN
Note 1. To measure REC-AGC-AMP, C-sync must be fixed to HIGH. Connect T38A, T36A, and T34A of the VIDEO
input pin to ground in the REC mode
2. Use a resistor of pin 74 to ground with the accuracy of
±1.0%
For to operat the HA-SW, it’s necessary to input the video signal to T20A.
And also confirm the output signal of T28.
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