NJM2549
ꢀ TERMINAL FUNCTION
(Ta = 25°C , V+ = 3V , No signal )
Pin No.
SYMBOL
EQUIVARENT CIRCUIT
VOLTAGE
FUNCTION
1
1
V+
--
Supply Voltage
5
1
2
3
4
5
2pin: IF Amplifier Input
3,4pin: IF Decoupling
An external decoupling
capacitor is connected to
enhance stability.
2
3
4
IF IN
IF DEC1
IF DEC2
1.95V
The bandwidth of IF
10k
10k
50k
Amplifier can be adjusted.
Large capacity: narrow IF
Small capacity: wide IF
50k
400uA
1
Received Signal Strength
Indicator Output
Pin6 outputs DC level
proportional to the log of
pin2 input signal level.
70
6
6
RSSI
--
15k
5
1
FM IF Output
This is a balanced output,
and the capacitor for the
phase-shifter is connected
between QUAD IN and
either of IF OUTs.
70
7
8
7
8
IF OUT2
IF OUT1
1.25V
70
The
joining
terminal
changes the inclination.
7pin:N-Corve
8pin:S-Corve
300uA 300uA
5
Ver.2010-06-24
- 8 -
NJRC [ NEW JAPAN RADIO ]
