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參數(shù)資料
| 型號(hào)： | LM1865N |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 接收器 |
| 英文描述： | Advanced FM IF System |
| 中文描述： | FM, AUDIO DEMODULATOR, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁(yè)數(shù)： | 6/16頁(yè) |
| 文件大?。?/td> | 309K |
| 代理商： | LM1865N |
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Typical Application
LAYOUT CONSIDERATIONS
Although the pinout of the LM1865 has been chosen to min-
imize layout problems, some care is required to insure sta-
bility. The ground terminal on CF1 should return to both
the input signal ground and the buffer ground, pin 19. The
ground terminal on CF2 should return to the ground side of
C4. The quadrature coil T1 and inductor L1 should be sepa-
rated from the input circuitry as far as possible.
PC Layout (Component Side)
TL/H/7509–6
PERFORMANCE CHARACTERISTICS OF TYPICAL
APPLICATION WITH TUNER
The following data was taken using the typical application
circuit in conjunction with an FM tuner with 43 dB of gain, a
5.5 dB noise figure, and 30 dB of AGC range. The tuner was
driven from a 50
X
source. 75
m
s of de-emphasis was used
on the audio output, pin 15. The 0 dB reference is for
g
75
kHz deviation at 400 Hz modulation.
Meter Output and
Signal-to-Noise
vs Tuner Input
Total Harmonic Distortion vs
Tuner Input
AM Rejection vs Tuner
Input
TL/H/7509–7
b
3 dB limiting
e
0.9
m
V
30 dB quieting
e
1.4
m
V
Level stop/mute threshold
e
1.4
m
V
Deviation mute window (
b
3 dB)
e
g
45 kHz
6
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| LM1870 | STEREO DEMODULATOR WITH BLEND |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM1865N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FM Receiver Circuit |
| LM1865N/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:FM Receiver Circuit |
| LM1866 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LOW VOLTAGE AM/FM RECEIVER |
| LM1866N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LOW VOLTAGE AM/FM RECEIVER |
| LM1866N/A+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AM/FM Receiver Circuit |
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