3-1
April 1997
CA3020, CA3020A
8MHz Power Amps For Military,
Industrial and Commercial Equipment
File Number 339.5
Features
• High Power Output Class B Amplifier
- CA3020 . . . . . . . . . . . . . . . . . . . . 0.5W (Typ) at V
CC
= 9V
- CA3020A . . . . . . . . . . . . . . . . . . 1.0W (Typ) at V
CC
= 12V
• Wide Frequency Range . . Up to 8MHz with Resistive Loads
• High Power Gain. . . . . . . . . . . . . . . . . . . . . . . . . 75dB (Typ)
• Single Power Supply For Class B Operation With
Transformer
- CA3020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 9V
- CA3020A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 12V
• Built-In Temperature-Tracking Voltage Regulator Provides
Stable Operation Over -55
o
C to 125
o
C Temperature Range
Applications
• AF Power Amplifiers For Portable and Fixed Sound and
Communications Systems
• Servo-Control Amplifiers
• Wide-Band Linear Mixers
• Video Power Amplifiers
• Transmission-Line Driver Amplifiers (Balanced and
Unbalanced)
• Fan-In and Fan-Out Amplifiers For Computer Logic Circuits
• Lamp-Control Amplifiers
• Motor-Control Amplifiers
• Power Multivibrators
• Power Switches
Description
The CA3020 and CA3020A are integrated-circuit, multi-
stage, multipurpose, wide-band power amplifiers on a single
monolithic silicon chip. They employ a highly versatile and
stable direct coupled circuit configuration featuring wide
frequency range, high voltage and power gain, and high
power output. These features plus inherent stability over a
wide temperature range make the CA3020 and CA3020A
extremely useful for a wide variety of applications in military,
industrial, and commercial equipment.
The CA3020 and CA3020A are particularly suited for service
as class B power amplifiers. The CA3020A can provide a
maximum power output of 1W from a 12V
DC
supply with a
typical power gain of 75dB. The CA3020 provides 0.5W
power output from a 9V supply with the same power gain.
Refer to AN5766 for application information.
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C) PACKAGE
PKG.
NO.
CA3020 -55 to 125 12 Pin Metal Can T12.B
CA3020A -55 to 125 12 Pin Metal Can T12.B
Pinout
CA3020
(METAL CAN)
TOP VIEW
Schematic Diagram
The resistance values included on the schematic diagram have been supplied as a convenience to assist
Equipment Manufacturers in optimizing the selection of “outboard” components of equipment designs.
The values shown may vary as much as 30%.
Intersil reserves the right to make any changes in the Resistance Values provided such changes do not
adversely affect the published performance characteristics of the device.
12
1
2
3
4
11
10
9
8
7
6
5
V-
RB8
DIFF IN2
DIFF IN3
OUTPUT 4
OUTPUT 5
OUTPUT 6
OUTPUT 7
BUFFER AMP
OUT
BUFFER
V
CC1
RB11
AMP IN
Q
1
R
10
Q
2
Q
3
10
1
3
1.5K
98 1
R
11 1.5K
D
1
D
2
D
3
R
4
R
1
R
3
R
6
0.3K R
9
Q
6
Q
7
Q
4
Q
5
R
5
R
2
R
5
10K
0.47K
12K
12 2
R
8
0.3K
7
6
5
4
[ /Title
(CA30
20,
CA302
0A)
/Sub-
ject
(8MHz
Power
Amps
For
Mili-
tary,
Indus-
trial
and
Com-
mer-
cial
Equip-
ment)
/Autho
r ()
/Key-
words
(Inter-
sil
Corpo-
ration,
Semi-
con-
ductor,
single,
power
ampli-
fier,
class b
ampli-
fier,
mili-
tary
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999