NTE1488
Integrated Circuit
FM IF Amp, Demod
w
/Muting, Center Meter
and Signal Meter
Features:
D
Low Distortion
D
High SignaltoNoise Ratio
D
High Limiting Sensitivity
D
Large Muting Attenuation
D
Provides Specific Signal for Direct Drive of a Signal Meter with Good Linearity
D
Muting Level is Variable by Adjusting the External Resistor
D
Hig Stability Against Abnormal Oscillation
Applications:
D
FM IF Amplifier
D
Quadrature Detector
D
Audio Amplifier
D
Muting Circuit
D
AFC, Tuning Meter Driver
D
AGC Control Voltage Generator
D
Muting Control Voltage Generator
D
Signal Meter Driver
Absolute Maximum Ratings:
Supply Voltage, V
CC
14V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
A
= +60
C), P
T
590mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
20
to +60
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Static (DC) Characteristics (V
CC
= 13V, No Signal)
Pin1 Voltage
V
1
1.95
V
Pin2 Voltage
V
2
1.95
V
Pin3 Voltage
V
3
1.95
V
Pin6 Voltage
V
6
5.60
V
Pin7 Voltage
V
7
5.60
V
Pin10 Voltage
V
10
5.60
V
Electrical Characteristics (Cont'd): (T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
AC Characteristics (V
CC
= 13V, f
c
= 10.7MHz, f
m
= 400Hz,
f = 75kHz)
Supply Current
I
CC
V
in
= 0dB
, Pin16 to GND Open
16
25
33
mA
Limiting Sensitivity
V
in(lim)
V
in
= 100dB
Input,
Input Level = 3dB from V
O(AF)
31
37
dB
Reversed AF Voltage
V
O(AF)
V
in
= 100dB
265
380
510
mV
rms
Total Harmonic Distortion
THD
V
in
= 100dB
0.03
0.10
%
SignaltoNoise Ratio
S/N
V
in
= 100dB
78
84
dB
AM Rejection Ratio
AMR
V
in
= 100dB
, AM: f
in
= 1kHz, Mod.
30%
45
54
dB
Muting Attenuation
Mute
(Att)
V
in
= 100dB
, Output standard with Pin5
Open, Attenuation with 2V impressed to
Pin5
70
85
dB
Muting Bandwidth
BW (Mute)
V
in
= 100dB
, Sum of + and
f for
V
12
= 1.4V
55
105
145
kHz
Muting Sensitivity
V
in
(Mute)
No muting level adjustment (Pin16
Open) input level for V
12
= 1.4V
36
44
60
dB
Muting Sensitivity Adjustment
Range
AV
in
(Mute) Max. input level with possible muting
level adjustment, Note 1
75
dB
Meter Drive Voltage
V
130
V
in
= 0dB
, Pin13 Voltage
0
V
V
1370
V
in
= 70dB
, Pin13 Voltage
0.9
1.45
V
V
13100
V
in
= 100dB
, Pin13 Voltage
4.7
5.2
V
AGC Control Voltage
V
15
V
in
= 80dB
, Pin15 Voltage
4.3
V
Note 1. Muting level can be adjusted up to 75dB
and should be set within this range.
V
CC
Pin Connection Diagram
GND
Det Tank
Det Tank
1
2
3
4
Input
GND
5
Mute Input
6
7
AFC Output
8
Quad Det
16
15
14
13
Mute Adjust
RF AGC
Meter Driver
12
Mute Output
11
10
9
AM/FM Switch
Bypass
Audio Output
PDF 
ZIP