参数资料
型号: LA1787M-MPB-E
厂商: ON Semiconductor
文件页数: 16/54页
文件大小: 0K
描述: IC CAR RADIO TUNER 64QFP
标准包装: 60
频率: 520kHz ~ 1.71MHz,64MHz ~ 108MHz
调制或协议: AM,FM
应用: 车载音频
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
电源电压: 8V
工作温度: -40°C ~ 85°C
封装/外壳: *
供应商设备封装: *
包装: *
LA1787M
Continued from preceding page.
Pin No.
Function
Description
Equivalent circuit
30k ?
R
47
VCC
47
FM muting on level
adjustment
Modify the value of the external
resistor to adjust the muting on
level.
Pin 24
140 μ A
Inverter
MUTE
A13586
VCC
RF AGC rectification capacitor
5.6V
10k ?
48
57
RF AGC bypass
RF AGC
The low frequency distortion is
determined as follows:
Increasing C48 and C57 improves
the distortion but makes the
response slower.
+
3.3 μ F
48
+
Antenna
damping
Reducing C48 and C57
aggravates the distortion but
makes the response faster.
For AGC use
57
+
47 μ F
A13587
2.6V
Due to the high gain of the limiter
10k ?
10k ?
50
51
IF bypass
FM IF input
amplifer, care must be taken when
choosing the grounding point for
the limiter amplifer input capacitor
to prevent oscillation.
0.022 μ F
330 ?
50
51
IF in
A13588
2k ?
100 ?
52
IF input
The input impedance is 2 k ? .
52
A13589
Continued on next page.
No. 6655-16/54
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