1525

NTE1525
Integrated Circuit
FM IF Amplifier
Features:
D Three Stage Differential IF Amplifier
D Differential Peak Detector
D Muting Circuit
D Signal Meter Drive Circuit
D High Recovered Output Voltage: VOD = 500mVrms (Typ)
D Low Distortion: THD = 0.1% (Typ)
D Wide Operating Supply Voltage Range: VCC = 8V to 15V (Typ)
D Signal Meter Drive Voltage: V3 = 4V (Typ)
D Variable Muting Point
D Muting Off at Open Terminal
D Simplified Single Coil Tuning
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7V
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mW
Derate above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4mW/°C
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +150°C
Electrical Characteristics: (VCC = 12V, f = 10.7MHz, fm = 400Hz, TA = +25°C unless otherwise
specified)
Parameter
Supply Current
Input Limiting Voltage
Symbol
ICC
VIN (lim)
Test Conditions
Min
Typ
Max
Unit
VIN = 0
10
14
18
mA
F = ±75kHz dev. −3dB Limiting
−
50
55
dBµV
−
50
−
dB
300
500
700
mVrms
AM Rejection Ratio
AMR
FM: F = ±75kHz dev.
AM: 30% Mod. VIN = 80dBµV
Recovered Output Voltage
VOD
F = ±75kHz dev. VIN = 80dBµV
Total Harmonic Distortion
THD
F = ±22.5kHz dev. VIN = 80dBµV
−
0.1
−
%
Signal−to−Noise Ratio
S/N
F = ±75kHz dev. VIN = 80dBµV
−
75
−
dB
Muting Attenuation
MA
F = ±75kHz dev. VIN = 80dBµV, V4 = 0
−
70
−
dB
Electrical Characteristics (Cont’d): (VCC = 12V, f = 10.7MHz, fm = 400Hz, TA = +25°C unless
otherwise specified)
Parameter
Symbol
Meter Drive Voltage
Test Conditions
Min
Typ
Max
Unit
−
4
−
V
−
5
−
kΩ
−
4.5
−
pF
−
1.3
−
kΩ
−
4
−
pF
−
7.7
−
kΩ
V3 (Max) VIN = 110dBµV
Parallel Input Resistance
rip
Parallel Input Capacitance
cip
Parallel Output Resistance
rop
Parallel Output Capacitence
cop
Output Resistance
RO
f = 10.7MHz, Pin1 − GND
f = 10.7 MHz, Pin6 − GND
f = 400Hz, Pin8 − GND
Pin Connection Diagram
(Front View)
9 VCC
8 AF Output
7 Detector Tank
6 Detector Tank
5 GND
4 Muting
3 Level Meter
2 Bypass
1 IF Input
.126 (3.2)
.323
(8.2)
Max
.100 (2.54)
.906 (23.0) Max
1
9
.020 (0.5)
.800 (20.3)
.099
(2.5)
Min