NTE1843
Integrated Circuit
FM Front End
Description:
The NTE1843 is an integrated circuit in a 9Lead SIP type package designed for use in FM frontend
applications. Typical applications include portable radio and radio cassettes.
Compared with conventional types, supply voltage dependence, overload characteristics and spuri-
ous radiation characteristics are improved.
Features:
D
Wide Supply Voltage Range: V
CC
= 1.6V to 6.0V
D
Excellent Supply Voltage Dependence of Loacl Oscillator: Oscillator Stop V
CC
= 0.9V Typ
D
Improved InterModulation Charactristics by Double Balanced Type Mixer Circuit
D
Low Spurious Radiation
D
BuiltIn Clamping Diode for the Local Oscillator Output
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Supply Voltage, V
CC
8V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation, P
D
500mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Derate Above 25
C
4mW/
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
25
to +75
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (T
A
= +25
C, V
CC
= 5V, f = 83MHz, f
m
= 1kHz,
f = 22.5kHz dev. unless
otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Current
I
CC
V
IN
= 0
5.2
8.0
mA
3dB Limiting Sensitivity
V
in(lim)
3.0
7.0
dB
Quiescent Sensitivity
Q
S
11
dB
Conversion Gain
G
C
31
dB
Local OSC Voltage
V
OSC
f
OSC
= 60MHz
150
230
350
mV
rms
Parallel Input Resistance (Pin1 Impedance)
r
ip1
57
Parallel Output Resistance (Pin3 Impedance)
r
op3
f = 83MHz
25
k
Parallel Output Capacitance (Pin3 Impedance)
c
op3
2.0
pF
Parallel Input Resistance (Pin4 Impedance)
r
ip4
2.7
k
Parallel Input Capacitance (Pin4 Impedance)
c
ip4
3.3
pF
Parallel Output Resistance (Pin6 Impedance)
r
op6
f = 10.7MHz
100
0
k
Parallel Output Capacitance (Pin6 Impedance)
c
op6
4.8
pF
Local OSC Stop Voltage
V
stop
0.9
1.3
V
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