NTE NTE1234

NTE1234
Integrated Circuit
FM IF Amplifier
Description:
The NTE1234 is designed for use in FM IF and TV sound IF amp applications. This device contains
3 different stage differential IF amp and a differential peak detector function.
Features:
D Excellent AM Rejection: (AMR = 50db typ.)
D High Sensitivity: (VIN(lim) = 50dBµV typ.)
D Operating Supply Voltage Range: (VCC = 8 to 15V, THD = 0.2% typ.)
D High Recovered Output Voltage: (VOD = 430mV typ. ±75kHz, dev.)
D Low Distortion: (THD = 0.2% typ. 500mV typ. ∆f = ±75kHz, dev.)
Absolute Maximum Ratings: (TA = +25°C, unless otherwise specified)
Supply Voltage, VCC, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V
Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.7Vrms
Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW
Operating Temperature Range, Topg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +125°C
Note 1. Derate above +25°C in this proportion of 4/mW/°C.
Electrical Characteristics: (TA = +25°C, VCC = 12V, unless otherwise specified)
Parameter
Symbol
Test Conditions
Supply Current
ICC
VIN = 0
Output Terminal
DC Voltage (Pin 7)
V7
Min Typ
Max
Unit
8
11
15
mA
VIN = 0, Short Pin 5,6
4.0
4.8
5.5
V
VOD
f = 10.7MHz, fM = 400Hz,
∆f = ±75kHz dev., VIN = 80dBµV
300 500
700
mVrms
VIN(lim)
f = 10.7MHz, fM = 400Hz,
∆f = ±22kHz dev., −3dB limiting
−
50
55
dBµV
Total Harmonic Distortion
THD
f = 10.7MHz, fM = 400Hz,
∆f = ±22kHz dev., VIN = 80dBµV
−
0.2
−
%
Signal to Noise Ratio
S/N
f = 10.7MHz, fM = 400Hz,
∆f = ±22kHz − 0 kHz VIN = 80dBµV
−
60
−
dB
AM Rejection Ratio
AMR
f = 10.7MHz, fM = 400Hz, VIN = 80dBµV,
FM: 75kHz dev, AM: 30% MOD
−
50
−
dB
Recovered Output Voltage
Input Limiting Voltage
Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 12V, unless otherwise specified)
Parameter
Symbol
Output Resistance
RO
Input Impedance
Parallel Resistance
rip
Parallel Capacitance
Output Impedance
Parallel Resistance
Parallel Capacitance
Test Conditions
f = 400MHz, Pin 7 − GND
f = 10.7MHz, Pin 1 − GND
cip
rop
f = 10.7MHz, Pin 5 − GND
cop
Min Typ
Max
Unit
6.2
7.7
9.5
kΩ
−
5
−
kΩ
−
4.5
−
pF
−
1.3
−
kΩ
−
4
−
pF
Pin Connection Diagram
7 Output
6 Detector
5 Detector Tank Circuit
4 GND
3
VCC
2 Feedback
1 Input
.128 (3.2)
.700 (17.8) Max
1
7
.099 (2.5) Min
.012 (0.25)
.100 (2.54)
.600 (15.24)
.323
(8.2)
Max