NTE746
Integrated Circuit
TV Video IF Amplifier
Description:
The NTE746 is a monolithic integrated circuit in an 8–Lead DIP type package with wide–range AGC
for replacement of 1st and 2nd IF stages in solid–state color and black and white TV sets. It will directly
drive a 3rd IF stage.
Features:
D Center Frequency: FO = 45MHz
D Y21 Constant to 75MHz
D Bandwidth: BW = 6MHz
D 12V Operation, Single–Polarity Power Supply
D Total Supply Current: 20mA Typ
D Power Gain: 50dB Min
D AGC Range: 60dB Min
D Nearly Constant Input and Output Admittance
D Low Reverse–Transfer Admittance: 1µmho Typ
over the Entire AGC Range
Applications:
D TV Video IF
D Defense Communications Satellite Programs
D Combined AM/FM Radio IF Amplifiers
D Linear Switch or Chopper for Multiplex Modulation or Demodulation
Absolute Maximum Ratings: (TA = +25°C)
Power Supply, V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Output Supply, V1, V8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
AGC Supply, VAGC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4V < VAGC < V+
Differential Input Voltage, Vin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±7V
Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW
Derate Above 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW/°C
Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +75°C
Electrical Characteristics: (V+ = 12V, TA = +25°C unless otherwise specified)
Parameter
DC Characteristics
Symbol
Test Conditions
Min Typ Max Unit
Total Supply Current
Output Stage Current
AGC Supply Voltage
IS
Pin1, Pin2, and Pin8
–
–
–
–
–
–
20
6.5
5.0
6.9
0.1
0.2
–
–
–
–
–
–
mA
mA
V
I1 + I8
VAGC 0dB Attenuation
60dB Attenuation
V
AGC Supply Current
IAGC
0db Attenuation
60dB Attenuation
mA
mA