ha3-2542-5 Intersil Corporation, ha3-2542-5 Datasheet - Page 6

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

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/2k , 20pF is needed for compensation to give a small
signal bandwidth of 30MHz with 40
power output voltage of 10V is needed, this same
Typical Applications
IN
IN
+
+
-
-
6
o
990
10
50
50
of phase margin. If a full
OUT
OUT
FIGURE 2. NONINVERTING CIRCUIT (A
FIGURE 3. NONINVERTING CIRCUIT (A
HA-2542
configuration will provide a bandwidth of 5MHz and a slew
rate of 200V/ s.
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
8
6
4
2
0
0
Frequency (dB) = 56MHz, Phase Margin (3dB) = 40
VCL
VCL
= 100)
= 2)
Frequency (0dB) = 44.9MHz,
Phase Margin (0dB) = 40
FREQUENCY RESPONSE
FREQUENCY RESPONSE
o
o
0
-45
-90
-135
-180
0
-45
-90
-135
-180