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NTE724
Integrated Circuit
Differential/Cascode Amplifier
Description:
The NTE724 is a differential/cascode amplifier in an 8–Lead TO5 type metal can package designed
for use in communications and industrial equipment operating at frequencies from dc to 120MHz.
Features:
D Controlled for Input Offset Voltage, Input Offset Current, and Input Bias Current
D Balanced Differential Amplifier Configuration with Controlled Constant–Current Source
D Single and Dual–Ended Operation
Applications:
D RF and IF Amplifiers (Differential or Cascode)
D DC, Audio, and Sense Amplifiers
D Converter in the Commercial FM Band
D Oscillator
D Mixer
D Limiter
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Power Dissipation (TA +85°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450mW
Derate Linearly Above 85°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW/°C
Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +125°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C
Lead Temperature (During Soldering, 1/16” from case, 10sec max), TL . . . . . . . . . . . . . . . . . +265°C
Electrical Characteristics: (TA = +25°C, VCC = +12V, VEE = –12V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Input Bias Current
III VCC = +6V, VEE = –6V
– 16.6 70.0 µA
– 36 106 µA
Quiescent Operating Current
I6 or I8 VCC = +6V, VEE = –6V
0.8 1.25 2.0 mA
2.0 3.3 5.0 mA
AGC Bias Current (Into Constant I7 VCC = 12V, VAGC = 9V
Current Source Pin7)
VCC = 12V, VAGC = 12V
– 1.28 –
– 1.65 –
mA
mA

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Electrical Characteristics (Cont’d): (TA = +25°C, VCC = +12V, VEE = 12V unless otherwise
specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Input Current (Pin7)
I7 VCC = +6V, VEE = 6V
0.5 0.85 1.0 mA
1.0 1.65 2.1 mA
Device Dissipation
PT VCC = +6V, VEE = 6V
24 36 54 mW
120 175 260 mW
Power Gain
GP VCC = 9V, Cascode
f = 100MHz Differential Amp
16 20 dB
14 17 dB
VCC = 9V, Cascode
f = 10.7MHz Differential Amp
35 39 dB
28 32 dB
Noise Figure
NF VCC = 9V, Cascode
f = 100MHz Differential Amp
7.2 9.0 dB
6.7 9.0 dB
Power Output (Untuned)
AGC Range
PO VCC = 9V, Diff. Amp 50InputOutput
AGC f = 10.7MHz Differential Amp
5.7 µW
62 dB
Voltage Gain
PeaktoPeak Output Current
A VCC = 0V, Cascode
f = 10.7MHz
RL = 1k
Differential Amp
40 dB
30 dB
IPP VCC = 9V Differential Amp, f = 10.7MHz, 2.0 4.0 7.0 mA
VCC = 12V ein = 400mV
3.5 6.0 10.0 mA
Pin Connection Diagram
(Top View)
Input Low
5
Output High 6
4 Current Source Emitter
AGC 7
3 Substrate and Case
8
Output Low
2
Current Source Bias
1
Input High

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.177 (4.5)
Max
.492
(12.5)
Min
.370 (9.39) Dia Max
.335 (8.52) Dia Max
.018 (0.45) Dia Typ
23
4
1
5
8
45° 7 6
.200 (5.06)
Dia
.032 (0.82)