MC3371 Datasheet, PDF (9/20 Pages) Motorola, Inc – LOW POWER FM IF

MC3371 MC3372
MC3372 PIN FUNCTION DESCRIPTION
OPERATING CONDITIONS VCC = 4.0 Vdc, RFIn = 100 µV, fmod = 1.0 kHz, fdev = 3.0 kHz. MC3372 at fRF = 45 MHz (see Figure 13).
Pin
Symbol
Internal Equivalent
Circuit
Description
Waveform
5
IFIn
IF Amplifier Input
6
DEC1
5
IFIn
6
DEC
53 k
60 µA
IF Decoupling. External 0.1 µF
capacitors connected to VCC.
7
IFOut
VCC
7
IFOut
IF Amplifier Output Signal level is
typically 300 mVpp.
50 µA
120 µA
8
QuadIn
8
QuadIn
VCC
Quadrature Detector Input. Signal
level is typically 150 mVpp.
10 _{50 µA}
9
RA
Recovered Audio. This is a composite
FM demodulated output having signal
and carrier components. Typical level
is 800 mVpp.
VCC
200 9
RAOut
100 µA
The filtered recovered audio has the
carrier signal removed and is typically
500 mVpp.
MOTOROLA ANALOG IC DEVICE DATA
9