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参数资料
| 型号： | LA1787M-MPB-E |
| 厂商： | ON Semiconductor |
| 文件页数： | 24/54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： | * |
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LA1787M
(4) Stereo indicator sensitivity improvement
The stereo indicator sensitivity (on/off) is equivalent to that of the LA1780M
Stereo on level
Stereo off level
LA1781M/1784M
LA1787M/1780M
4.1%
2.6%
3.1%
1.6%
(Typical value)
* : The pilot level such that the stereo indicator goes on or off for a 10.7 MHz unmodulated IF input.
(5) FM oscillator circuit removed
The internal FM oscillator circuit provided in the LA1781M has been removed. The FM oscillator level can be
adjusted by constructing an external circuit block.
*: However, this requires 4 more external parts than the LA1781M: 1 transistor and 3 resistors/capacitors.
VCC
4
IC internal
VCC
4
IC internal
VCC
Vt
Vt
LA1787M/1784M FM OSC
A13600
LA1780M/1781M FM OSC
A13601
3. Gain distribution
The table below shows the gain distribution of the LA1780M, LA1784M, and LA1787M. (These are measured
values.) Compared to the LA1784M, the total gain is lower.
1st MIX (10.7)
1st IF (10.7)
2nd MIX (450)
2nd IF (450)
LA1780M
LA1784M
LA1787M
10 dB
7.5 dB
7.5 dB
3.3 dB
13 dB
3.5 dB
3.2 dB
7 dB
8.6 dB
69 dB
66 dB
67 dB
First mixer
First IF amplifier
Second mixer
Second IF amplifier
: No circuit changes from the LA1784M.
: Equivalent to the LA1780M circuit. (The gain is lower than that in the LA1781M and LA1784M.)
: The mixer circuit has been modified to improve adjacent channel suppression and interference.
: Equivalent to the LA1780M circuit.
No. 6655-24/54
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相关代理商/技术参数 |
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| LA1787NM | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Single-Chip Car Radio System IC |
| LA1787NM_09 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Single-Chip Car Radio System IC |
| LA1787NM-MPB-E | 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Trays 制造商:ON Semiconductor 功能描述:FTRAY / ANALOG CAR RADIO TUNER |
| LA1787NM-TLM-E | 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Tape and Reel 制造商:ON Semiconductor 功能描述:REEL / ANALOG CAR RADIO TUNER |
| LA17B-10H | 制造商:LIGITEK 制造商全称:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
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