HA-2542(2002) 查看數據表（PDF） - Intersil
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HA-2542 Datasheet PDF : 12 Pages
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HA-2542
120
VOUT = ±5V
VS = ±15V
100
80
60
40
20
PDIP
0
0 5 10 15 20 25 30 35 40 45 50
OUTPUT CURRENT (100% DUTY CYCLE, mA)
FIGURE 1. MAXIMUM OPERATING TEMPERATURE vs
OUTPUT CURRENT
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
Typical Applications
possible: 4) placing power supply decoupling capacitors
from device supply pins to ground.
Frequency Compensation
The HA-2542 may be externally compensated with a single
capacitor to ground. This provides the user the additional
flexibility in tailoring the frequency response of the amplifier.
A guideline to the response is demonstrated on the typical
performance curve showing the normalized AC parameters
versus compensation capacitance. It is suggested that the
user check and tailor the accurate compensation value for
each application. As shown additional phase margin is
achieved at the loss of slew rate and bandwidth.
For example, for a voltage gain of +2 (or -1) and a load of
500pF/2kΩ, 20pF is needed for compensation to give a small
signal bandwidth of 30MHz with 40o of phase margin. If a full
power output voltage of ±10V is needed, this same
configuration will provide a bandwidth of 5MHz and a slew
rate of 200V/µs.
If maximum bandwidth is desired and no compensation is
needed, care must be given to minimize parasitic
capacitance at the compensation pin. In some cases where
minimum gain applications are desired, bending up or totally
removing this pin may be the solution. In this case, care
must also be given to minimize load capacitance.
For wideband positive unity gain applications, the HA-2542
can also be over-compensated with capacitance greater
than 30pF to achieve bandwidths of around 25MHz. This
over-compensation will also improve capacitive load
handling or lower the noise bandwidth. This versatility along
with the ±100mA output current makes the HA-2542 an
excellent high speed driver for many power applications.
40
30
20
10
IN
+
-
OUT
0
990Ω
10Ω
0
-45
-90
-135
-180
Frequency (0dB) = 44.9MHz,
Phase Margin (0dB) = 40o
FREQUENCY RESPONSE
FIGURE 2. NONINVERTING CIRCUIT (AVCL = 100)
6
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