NTE NTE1491 Datasheet
NTE1491
Integrated Circuit
AM RF/IF Amp
Description:
The NTE1491 is an integrated circuit in a 14–Lead DIP type package designed for AM/FM receivers.
Features:
D Low External Parts
D IF, RF, AGC, in One Single Package
D Dual AGC Amps
Absolute Maximum Ratings:
Supply Voltage, V
Signal Input Voltage, V
CC
i
Total Power Dissipation (T
Operating Temperature Range, T
Storage Temperature Range, T
Recommended Operating Condition:
Parameter
Supply Voltage V
Electrical Characteristics: (TA = +25°C, VCC = 13V, f = 1MHz, f
Parameter
Idle Current I
Maximum Sensitivity MS υo = 20mV
(TA = +25°C unless otherwise specified)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
= +75°C), P
A
opt
stg
D
–20° to +75°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(TA = +25°C unless otherwise specified)
Symbol Min Typ Max Unit
9 13 16 V
. = 400Hz, MOD = 30%,
mod
= 10kΩ unless otherwise specified)
R
L
CC
Symbol Test Conditions Min Typ Max Unit
CC
rms
18 26 34 mA
– 10 17 dB/µV
350mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Signal Noise S/N υi = 74dBµV 48 55 – dB
7V
18V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
p–p
Detector Voltage Out υ
o
υi = 74dBµV 40 60 90 mV
Total Harmonic Distortion THD υi = 126dBµV – 0.4 3 %
rms
Tuner Performance: (TA = +25°C, VCC = 13V, f = 1MHz, f
unless otherwise specified)
. = 400Hz, MOD = 30%, RL = 10kΩ
mod
Characteristics
Maximum Sensitivity υo = 20mV
Test Conditions Typ Unit
rms
10 dBµV
Usable Sensitivity (υi) S/N = 20dB 24 dBµV
Distortion Output Voltage υi = 74 dBµV 60 mV
rms
Harmonic Distortion υi = 74dBµV 0.4 %
S/N Ratio υi = 74dBµV 55 dB
Total Harmonic Distortion υi = 126dB 0.4 %
IF Rejection Ratio f = 1MHz, υo = 20mV, IF = 450kHz 67 dB
Image Rejection Ratio f = 1MHz, υo = 20mV, f + 2 IF 80 dB
Selectivity f = 1MHz, ∆f = ± 10kHz 31 dB
AM Whistle Rejection υi = 74dBµV
2nd IF = 900kHz 45 dB
3rd IF = 1350kHz 50 dB
Pin Connection Diagram
Mixer Output
IF Input
1
2
V
14
CC
13
OSC Output
Bypass
IF Output
14 8
17
.785 (19.95)
Max
3
4
5AGC Input
6Bypass
7GND
12
OSC Input
11
Mixer Input
10 RF Output
9 Bypass
8 RF Input
.200 (5.08)
Max
.300
(7.62)
.100 (2.45)
.600 (15.24)
.099 (2.5) Min
Loading...