NTE NTE724 Datasheet

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:

Power Dissipation (T

≤ +85°C), P

A

(TA = +25°C unless otherwise specified)

D

450mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Derate Linearly Above 85°C 5mW/°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Ambient Temperature Range, T
Storage Temperature Range, T

stg

Lead Temperature (During Soldering, 1/16” from case, 10sec max), T

Electrical Characteristics:

Parameter Symbol Test Conditions Min Typ Max Unit

Input Bias Current I

Quiescent Operating Current I6 or I8VCC = +6V, VEE = –6V 0.8 1.25 2.0 mA

AGC Bias Current (Into Constant

Current Source Pin7)

(TA = +25°C, VCC = +12V, VEE = –12V unless otherwise specified)

II

I

7

opr

L

VCC = +6V, VEE = –6V – 16.6 70.0 µA

VCC = 12V, V
VCC = 12V, V

= 9V – 1.28 – mA

AGC

= 12V – 1.65 – mA

AGC

–55° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–65° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

+265°C. . . . . . . . . . . . . . . . .

– 36 106 µA

2.0 3.3 5.0 mA

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) I

Device Dissipation P

Power Gain G

Noise Figure NF

Power Output (Untuned) P
AGC Range AGC
Voltage Gain A

Peak–to–Peak Output Current I

7

T

P

O

P–P

VCC = +6V, VEE = –6V 0.5 0.85 1.0 mA

1.0 1.65 2.1 mA

VCC = +6V, VEE = –6V 24 36 54 mW

120 175 260 mW

VCC = 9V,
f = 100MHz

VCC = 9V,
f = 10.7MHz

VCC = 9V,
f = 100MHz

VCC = 9V,
f = 10.7MHz

VCC = 0V,
f = 10.7MHz
R

= 1kΩ

L

VCC = 9V
VCC = 12V

Cascode 16 20 – dB
Differential Amp 14 17 – dB
Cascode 35 39 – dB
Differential Amp 28 32 – dB
Cascode – 7.2 9.0 dB
Differential Amp – 6.7 9.0 dB
Diff. Amp 50Ω Input–Output – 5.7 – µW
Differential Amp – 62 – dB
Cascode – 40 – dB

Differential Amp – 30 – dB
Differential Amp, f = 10.7MHz,

ein = 400mV

2.0 4.0 7.0 mA

3.5 6.0 10.0 mA

Output High

AGC

Output Low

Pin Connection Diagram

(Top View)

Input Low

5

6

7

8

1

Input High

Current Source Emitter

4

Substrate and Case

3

2

Current Source Bias