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參數(shù)資料
| 型號： | LA7458W |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, SQFP-64 |
| 文件頁數(shù)： | 11/22頁 |
| 文件大小： | 244K |
| 代理商： | LA7458W |
LA7458W
No.A0642-19/22
Continued from preceding page.
SW No.
Parameter
Symbol
Input
point
Test
point
1
3
5
6
16
23
31
42
46
47
48
53
54
55
59
61
Remark
Microphone mode
output noise voltage
VNAL
TA5
TA50
B
A
B
A
B
Microphone/line
inter-input crosstalk
VCTIN
TA5
TA59
TA50
B
A
B
A
B
BBB
BA
C
A
B
A
B
Electronic volume
control standard output
level
VEVRTYP
TA59
TA45
B
A
B
C
A
B
VEE49 1.575V
Electronic volume
control maximum
output level
VEVRMAX
TA59
TA45
B
A
B
C
A
B
VEE49 3.15V
Electronic volume
control minimum
output level
VEVRMIN
TA59
TA45
B
A
B
C
A
B
VEE49 0V
Speaker amplifier
voltage gain
VGSP
TA42
TA39
TA41
B
A
B
C
A
B
Speaker amplifier
distortion
THSP
TA42
TA39
TA41
B
A
B
C
A
B
Speaker amplifier
maximum output
VOSP
TA42
TA39
TA41
B
A
B
C
A
B
Speaker amplifier
output noise voltage
VNSP
TA42
TA39
TA41
B
A
B
C
A
B
H/P amplifier voltage
gain
VGHP
TA42
TA30
TA32
B
A
B
A
B
C
A
B
H/P amplifier distortion
THHP
TA42
TA30
TA32
B
A
B
A
B
C
A
B
H/P amplifier
maximum output
VOHP
TA42
TA30
TA32
B
A
B
A
B
C
A
B
H/P amplifier output
noise voltage
VNHP
TA42
TA30
TA32
B
A
B
C
A
B
NR encoder standard
output level
VORL
TA59
TA28
B
A
B
C
A
B
NR encoder frequency
linearity
VOXL
TA59
TA28
B
A
B
C
A
B
NR encoder frequency
characteristics
(SP mode)
VFSRL
TA59
TA28
B
A
B
C
A
B
NR encoder frequency
characteristics
(LP mode, NTSC only)
VFPRL
TA59
TA28
B
A
B
C
A
B
VCO (NTSC mode)
1.5MHz oscillator
frequency
FONT
TA19
B
A
B
C
A
B
Input fsc to TA23.
VCO (PAL mode)
1.5MHz oscillator
frequency
FOPA
TA19
B
A
B
C
A
B
Input fsc to TA23.
VCO output level
(1.5MHz)
VVCO
TA19
B
A
B
C
A
B
Input fsc to TA23.
FM (VCO) output
second-order
harmonic distortion,
1.5MHz
VVCO2
TA19
B
A
B
C
A
B
Input fsc to TA23.
FM (VCO) output
third-order harmonic
distortion, 1.5MHz
VVCOL
TA19
B
A
B
C
A
B
Input fsc to TA23.
VCO (PM-record)
reference frequency
deviation, 1.5MHz
FDO
TA59
TA19
B
A
B
C
A
B
Input fsc to TA23.
Standard FM
modulation distortion
THDFM
TA59
TA19
B
A
B
C
A
B
Input fsc to TA23.
Demodulate the
TA19 output.
Overmodulation
prevention limiter level
FDMX
TA59
TA19
B
A
B
C
A
B
Continued on next page.
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