H2842F5 データシートの表示（PDF） - Intersil
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H2842F5 Datasheet PDF : 10 Pages
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HA-2842
Application Information
The Intersil HA-2842 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 50Ω and 75Ω
coaxial cable systems as a driver, the HA-2842 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.
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 plane.
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.
Power Dissipation Considerations
At high output currents, especially with the 8 lead SOIC
package, care must be taken to ensure that the Maximum
Junction Temperature (TJ, see “Absolute Maximum Ratings”
table) isn’t exceeded. As an example consider the HA-2842 in
the SOIC package, with a required output current of 50mA at
VOUT = 10V with ±15V supplies. The power dissipation is the
quiescent power (450mW = 30V x 15mA) plus the power
dissipated in the output stage
(POUT = 250mW = 50mA x (15V - 10V)), or a total of 700mW.
The thermal resistance (θJA) of the SOIC package is 157oC/W,
which increases the junction temperature by 110oC over the
ambient temperature (TA). Remaining below TJMAX requires
that TA be restricted to ≤ 40oC (150oC - 110oC). Heatsinking
would be required for operation at ambient temperatures
greater than 40oC.
MAX POUT WITHOUT HEATSINK (VS = ±15V)
TA
85oC
8 LEAD SOIC
(θJA = 157oC/W)
Heatsink Required
70oC
60mW
25oC
350mW
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.
Typical Performance Curves TA = 25oC, VSUPPLY = ±15V, RL = 1kΩ, CL < 10pF, Unless Otherwise Specified
120
100
80
60
40
20
0
10
OPEN LOOP
AVCL = 1000
AVCL = 100
AVCL = 10
AVCL = 2
OPEN LOOP
0
90
AVCL AVCL AVCL AVCL 180
= 1000 = 100 = 10 = 2
100 1K 10K 100K 1M 10M 100M
FREQUENCY (Hz)
100
90
80
70
60
50
40
30
5
67
8 9 10 11 12 13
SUPPLY VOLTAGE (±V)
14 15
FIGURE 1. FREQUENCY RESPONSE FOR VARIOUS GAINS
FIGURE 2. GAIN BANDWIDTH PRODUCT vs SUPPLY VOLTAGE
5
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