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NJM2597 データシート(PDF) 7 Page - New Japan Radio

部品番号 NJM2597
部品情報  455kHz INPUT FM IF DEMODULATOR
PDF  16 Pages
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メーカー  NJRC [New Japan Radio]
ホームページ  http://www.jrc.co.jp/eng/index.html
Logo NJRC - New Japan Radio

NJM2597 データシート(HTML) 7 Page - New Japan Radio

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NJM2590/97
Ver.2004-08-25
-7-
TERMINAL FUNCTION (Ta=25°C, V
+=1.8V)
Pin No.
SYMBOL
EQUIVARENT CIRCUIT
VOLTAGE
FUNCTION
1
IF IN
1.75V
IF Amplifier Input.
Typical input impedance is
2kΩ.
Built in ESD protective
circuit.
3
DEC
1.75V
IF Decoupling.
Connected with an external
decoupling capacitor.
Built-in ESD protective
circuit
2
GND
--
Ground.
4
FSK REF
0.9V
FSK Reference Input.
This is a reference input of
wave shaping comparator.
Connected with an external
capacitor.
A quick charge/discharge
circuit offers the voltage of
pin 4 comes the same
voltage of pin 8 quickly.
Built-in ESD protective
circuit.
5
QUAD IN
0.5V
Quadrature Detector Input.
Connected with a ceramic
discriminator.
Built-in ESD protective
circuit.
6
AF OUT
0.2V
FM demodulated signal
output.
Built-in ESD protective
circuit.
3
1
V+
5
V+
6
V+
4
V+



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