參數(shù)資料
型號： MC3372D
廠商： MOTOROLA INC
元件分類： 接收器
英文描述： LOW POWER FM IF
中文描述： FM, AUDIO SINGLE CHIP RECEIVER, PDSO16
封裝： PLASTIC, SO-16
文件頁數(shù)： 6/20頁
文件大小： 471K
代理商： MC3372D
MC3371 MC3372
6
MOTOROLA ANALOG IC DEVICE DATA
MC3371 PIN FUNCTION DESCRIPTION
OPERATING CONDITIONS
VCC = 4.0 Vdc, RFIn = 100
μ
V, fmod = 1.0 kHz, fdev = 3.0 kHz. MC3371 at fRF = 10.7 MHz (see Figure 11).
Internal Equivalent
Circuit
Pin
1
Symbol
OSC1
Description
Waveform
OSC1
2
VCC
1
15 k
The base of the Colpitts oscillator. Use
a high impedance and low capacitance
probe or a “sniffer” to view the wave–
form without altering the frequency.
Typical level is 450 mVpp.
2
OSC2
200
μ
A
OSC2
The emitter of the Colpitts oscillator.
Typical signal level is 200 mVpp. Note
that the signal is somewhat distorted
compared to that on Pin 1.
3
MXOut
3
4
MixerOut
VCC
1.5 k
Output of the Mixer. Riding on the
455 kHz is the RF carrier component.
The typical level is approximately
60 mVpp.
4
VCC
100
μ
A
Supply Voltage –2.0 to 9.0 Vdc is the
operating range. VCC is decoupled to
ground.
5
IFIn
1.8 k
7
51 k
DEC2
53 k
5
IFIn
6
DEC1
Input to the IF amplifier after passing
through the 455 kHz ceramic filter. The
signal is attenuated by the filter. The
typical level is approximately
50 mVpp.
6
7
DEC1
DEC2
60
μ
A
IF Decoupling. External 0.1
μ
F
capacitors connected to VCC.
8
Quad
Coil
10
VCC
8
Quad Coil
50
μ
A
Quadrature Tuning Coil. Composite
(not yet demodulated) 455 kHz IF
signal is present. The typical level is
500 mVpp.
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