NJM2550 JRC, NJM2550 Datasheet - Page 5

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

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Ver.2006-02-24
Pin No.
1
2
3
4
5
6
TERMINAL FUNCTION (
RSSI REF
SYMBOL
IF OUT
GND
IF IN
DEC
V
+
1
4
5
6
3
Ta=25°C, V
EQUIVARENT CIRCUIT
165
50k
64k
+
165
=3 V
--
140uA
)
GND
V+
GND
V+
GND
GND
V+
V+
VOLTAGE
1.12V
2.46V
2.06V
2.46
--
--
RSSI Reference Current
Control
To control RSSI reference current,
a resistor is connected to pin1 and
pin6, respectively.
The recommended value is 33kΩ.
By choosing the different thermal
coefficient of these two resisters,
RSSI thermal characteristics can
be changed.
Ground
IF Limiter Amplifier Input
The typical input impedance is
330Ω.
IF Decoupling
An external decoupling capacitor
is connected to enhance stability.
Supply Voltage
IF Limiter Amplifier Output
An external phase-shifting coil or
discriminator is connected
between pin6 and pin7.
FUNCTION
NJM2550
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