ha3-2542-5 Intersil Corporation, ha3-2542-5 Datasheet - Page 5

• Manufacturer Part Number: ha3-2542-5
• Description: 70mhz, High Slew Rate, High Output Current Operational Amplifier
• Manufacturer: Intersil Corporation

Application Information
The Intersil HA-2542 is a state of the art monolithic device
which also approaches the “ALL-IN-ONE” amplifier concept.
This device features an outstanding set of AC parameters
augmented by excellent output drive capability providing for
suitable application in both high speed and high output drive
circuits.
Primarily intended to be used in balanced 50 and 75
coaxial cable systems as a driver, the HA-2542 could also be
used as a power booster in audio systems as well as a
power amp in power supply circuits. This device would also
be suitable as a small DC motor driver.
The applications shown in Figures 2 through Figure 4
demonstrate the HA-2542 at gains of +100 and +2 and as a
video cable driver for small signals.
5
(Refer to Application Note AN552 for Further Information)
HA-2542
Power Dissipation Considerations
At high output currents, especially with the PDIP package,
care must be taken to ensure that the Maximum Junction
Temperature (T
not exceeded. As an example consider the HA-2542 in the
PDIP package, with a required output current of 20mA at
V
(1.2W = 30V x 40mA) plus the power dissipated in the
output stage (P
total of 1.4W. The thermal resistance (
package is 100
temperature by 140
Remaining below T
10
operation at ambient temperatures greater than 10
Note that the problem isn’t as severe with the CERDIP
package due to it’s lower thermal resistance, and higher
T
used to ensure that heat sinking is not required.
Allowable output power can be increased by decreasing the
quiescent dissipation via lower supply voltages.
For more information please refer to Application Note
AN556, “Thermal Safe Operating Areas for High Current Op
Amps”.
Prototyping Guidelines
For best overall performance in any application, it is
recommended that high frequency layout techniques be
used. This should include: 1) mounting the device through a
ground plane: 2) connecting unused pins (NC) to the ground:
3) mounting feedback components on Teflon standoffs and
or locating these components as close to the device as
possible: 4) placing power supply decoupling capacitors
from device supply pins to ground.
JMAX
OUT
o
FIGURE 1. MAXIMUM OPERATING TEMPERATURE vs
C (150
120
100
80
60
40
20
= 5V. The power dissipation is the quiescent power
0
. Nevertheless, it is recommended that Figure 1 be
0
o
C - 140
5
OUTPUT CURRENT
OUTPUT CURRENT (100% DUTY CYCLE, mA)
o
J
OUT
, see “Absolute Maximum Ratings” table) is
C/W, which increases the junction
10
o
JMAX
o
C). Heatsinking would be required for
= 200mW = 20mA x (15V - 5V)), or a
C over the ambient temperature (T
15
requires that T
PDIP
20
CERDIP
25
30
JA
A
35
be restricted to
) of the PDIP
V
V
40
OUT
S
= 15V
o
= 5V
45
C.
A
50
).