NJM2550 JRC, NJM2550 Datasheet - Page 6

• Manufacturer Part Number: NJM2550
• Description: FM IF Demodulator IC / SSOP16
• Manufacturer: JRC

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Ver.2006-02-24
Pin No.
10
11
7
8
9
FSK VREF
AMP OUT
SYMBOL
QUAD IN
AF OUT
AMP IN
11
7
8
9
EQUIVARENT CIRCUIT
400
35k
20uA
44uA
95uA
210uA
400
V+
10
V+
GND
GND
V+
V+
GND
GND
VOLTAGE
0.61V
0.61V
--
--
--
Quadrature Detector Input
An external phase-shifting coil or
discriminator is connected
between pin6 and pin7.
Note that supply voltage should
be the same as the voltage
supplied to pin5.
Demodulated Signal Output
An external 3rd order multiple
feedback filter(RC filter) is
connected between pin8 and pin9.
Buffer Amplifier Input
A set of external RC component
forms a low pass filter between
pin9 and pin10.
Buffer Amplifier Output
A set of external RC component
forms a low pass filter between
pin9 and pin10.
FSK Reference Voltage Output
This pin usually keeps open. This
fixed output voltage may be
available for the FSK reference
voltage by connecting to pin13.
This usage is effective in shaping
the data signal with continuous
bits of the same polarity.
Note that this usage is under
consideration
FUNCTION
NJM2550
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