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參數(shù)資料
| 型號： | LA7471M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Two-Channel Microphone Amplifier for Video Camera(用于立體聲攝像機的2通道擴音器放大器) |
| 中文描述： | 雙通道視頻攝像機麥克風放大器（用于立體聲攝像機的2通道擴音器放大器） |
| 文件頁數(shù)： | 2/10頁 |
| 文件大小： | 180K |
| 代理商： | LA7471M |
Operating Characteristics
at Ta = 25°C, V
CC
= 5.0 V, f = 1.0 kHz, R
L
= 10 k
Block Diagram
No. 4488-2/10
LA7471M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Current dissipation
I
CC1
I
CC2
VG
1
VG
2
VG
3
VG
4
INT MIC in, EXT V
CC
off, L/Rch
INT MIC in, EXT V
CC
on, L/Rch
EXT MIC in, L/Rch
5.5
8
10.5
mA
6
9
12
mA
27.3
27.8
28.3
dB
Voltage gain
INT MIC in, Gain CTL Hi, L/Rch
23.8
24.3
24.8
dB
INT MIC in, Gain CTL Mi, L/Rch
20.8
21.3
21.8
dB
INT MIC in, Gain CTL Lo, L/Rch
17.8
18.3
18.8
dB
Total harmonic distortion
THD
INT MIC in, EXT MIC in
V
O
= 300 mVrms, L/Rch
INT MIC in, EXT MIC in
THD = 1%, L/Rch
EXT MIC in, L/Rch, Rg = 1 k
, JIS-A
INT MIC in, L/Rch, Rg = 1 k
, JIS-A
Gain CTL Hi, Mi, Lo
INT MIC in
→
EXT MIC in (Rg = 1 k
)
f = 10 kHz, L/Rch
INT/EXT MIC, Lch
→
Rch, Rch
→
Lch,
f = 10 kHz
0.05
0.2
%
Maximum output
V
OM
1.0
1.4
Vrms
V
NO1
22
32
μVrms
Output noise voltage
V
NO2
16
24
μVrms
Input switch crosstalk
SW
CR
80
70
dB
Inter-channel crosstalk
CH
CR
51
45
dB
Internal microphone power supply
output voltage
V
INM
When pin 31 is DC, with 30 k
load
2.65
2.8
2.95
V
External power supply output voltage
V
EXM
I
LIM
CTL
H
CTL
L
Z
IN
Z
O
When connected to pin 16 (output current)
4.0
4.5
V
External power supply limiter current
When connected to pin 16 (output current)
30
mA
Input switching control voltage
High level, pin 29/pin 35 DC
1.3
V
CC
0.7
V
Low level, pin 29/pin 35 DC
0
V
k
Input impedance
INT/EXT MIC in, L/Rch
60
75
90
Output impedance
Pins 8 and 20
1
5
Unit (resistance:
)
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