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參數(shù)資料
| 型號： | LA7471M |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 CHANNEL, AUDIO PREAMPLIFIER, PQFP36 |
| 封裝： | QFP-36 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 180K |
| 代理商： | LA7471M |
Operating Characteristics at Ta = 25°C, VCC = 5.0 V, f = 1.0 kHz, RL = 10 k
Block Diagram
No. 4488-2/10
LA7471M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Current dissipation
ICC1
INT MIC in, EXT VCC off, L/Rch
5.5
8
10.5
mA
ICC2
INT MIC in, EXT VCC on, L/Rch
6
9
12
mA
VG1
EXT MIC in, L/Rch
27.3
27.8
28.3
dB
Voltage gain
VG2
INT MIC in, Gain CTL Hi, L/Rch
23.8
24.3
24.8
dB
VG3
INT MIC in, Gain CTL Mi, L/Rch
20.8
21.3
21.8
dB
VG4
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
0.05
0.2
%
VO = 300 mVrms, L/Rch
Maximum output
VOM
INT MIC in, EXT MIC in
1.0
1.4
Vrms
THD = 1%, L/Rch
VNO1
EXT MIC in, L/Rch, Rg = 1 k
, JIS-A
22
32
Vrms
Output noise voltage
VNO2
INT MIC in, L/Rch, Rg = 1 k
, JIS-A
16
24
Vrms
Gain CTL Hi, Mi, Lo
Input switch crosstalk
SWCR
INT MIC in
→ EXT MIC in (Rg = 1 k)
80
70
dB
f = 10 kHz, L/Rch
Inter-channel crosstalk
CHCR
INT/EXT MIC, Lch
→ Rch, Rch → Lch,
51
45
dB
f = 10 kHz
Internal microphone power supply
VINM
When pin 31 is DC, with 30 k
load
2.65
2.8
2.95
V
output voltage
External power supply output voltage
VEXM
When connected to pin 16 (output current)
4.0
4.5
V
External power supply limiter current
ILIM
When connected to pin 16 (output current)
30
mA
Input switching control voltage
CTLH
High level, pin 29/pin 35 DC
1.3
VCC
V
CTLL
Low level, pin 29/pin 35 DC
0
0.7
V
Input impedance
ZIN
INT/EXT MIC in, L/Rch
60
75
90
k
Output impedance
ZO
Pins 8 and 20
1
5
Unit (resistance:
)
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| LA7472M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA7473V | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA7477W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| LA7505 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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