NJM2552 JRC, NJM2552 Datasheet - Page 9

• Manufacturer Part Number: NJM2552
• Description: FM IF Demodulator IC / SSOP20
• Manufacturer: JRC

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Ver.2006-11-06
Pin No.
14
15
16
17
AM AF OUT
RSSI OUT
SYMBOL
RF AGC
AM SW
OUT
14
15
16
17
GND
GND
GND
GND
V+
EQUIVARENT CIRCUIT
V+
50k
2k
55k
2k
120k
100u
2k
2k
2k
VOLTAGE
1.46V
0.17V
0.08V
--
AM Demodulated Signal Output
An external RC filter may be
connected to reduce undesired
signal.
AM Section ON /OFF Switch
Both of AM and FM section are in
action during AM SW=HIGH.
When AM SW=LOW, AM section
keeps a state of not working.
Received Signal Strength
Indicator Output
Pin 16 outputs DC level
proportional to the log of input
signal level to pin7.
Output of RF AGC circuit
Pin 17 outputs DC voltage to
control the gain of external RF
amplifier.
FUNCTION
NJM2552
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