NJM2550 データシートの表示（PDF） - Japan Radio Corporation
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NJM2550 Datasheet PDF : 15 Pages
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NJM2550
Pin No. SYMBOL
7
QUAD IN
8
AF OUT
9
AMP IN
EQUIVARENT CIRCUIT
400
7
V+
400
95uA
VOLTAGE
FUNCTION
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.
GND
Demodulated Signal Output
V+
An external 3rd order multiple
feedback filter(RC filter) is
connected between pin8 and pin9.
8
44uA
0.61V
GND
V+
20uA
Buffer Amplifier Input
A set of external RC component
forms a low pass filter between
--
pin9 and pin10.
9
10
AMP OUT
11
FSK VREF
11
35k
10
210uA
GND
V+
GND
Buffer Amplifier Output
A set of external RC component
forms a low pass filter between
--
pin9 and pin10.
0.61V
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
Ver.2006-02-24
-6-
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