EL5210C Elantec Semiconductor, Inc. (acquired by Intersil), EL5210C Datasheet - Page 12

• Manufacturer Part Number: EL5210C
• Description: Dual 25MHz Rail-to-Rail, I/o op Amps
• Manufacturer: Elantec Semiconductor, Inc. (acquired by Intersil)

EL5210C/EL5410C
30MHz Rail-to-Rail Input-Output Op Amps
stage of the device begin to conduct and overvoltage
damage could occur.
Power Dissipation
With the high-output drive capability of the EL5210C
and EL5410C amplifiers, it is possible to exceed the
125°C 'absolute-maximum junction temperature' under
certain load current conditions. Therefore, it is important
to calculate the maximum junction temperature for the
application to determine if load conditions need to be
modified for the amplifier to remain in the safe operating
area.
The maximum power dissipation allowed in a package is
determined according to:
Where:
The maximum power dissipation actually produced by
an IC is the total quiescent supply current times the total
T
T
Θ
P
Package.
Figure 2. Operation with Beyond-the-Rails
JMAX
AMAX
DMAX
JA
= Thermal Resistance of the Package
= Maximum Ambient Temperature
= Maximum Junction Temperature
= Maximum Power Dissipation in the
1V
1V
P
D MAX
=
Input
T
-------------------------------------------- -
JM AX
10µ S
Θ
–
JA
T
A MA X
V
T
A
V
S
A
V
IN
=±2.5V
=25°C
=1
=6V
P-P
12
power supply voltage, plus the power in the IC due to the
loads, or:
when sourcing, and
when sinking.
Where:
If we set the two P
we can solve for R
ure 3 and Figure 4 provide a convenient way to see if the
device will overheat. The maximum safe power dissipa-
tion can be found graphically, based on the package type
and the ambient temperature. By using the previous
equation, it is a simple matter to see if P
the device's power derating curves. To ensure proper
operation, it is important to observe the recommended
derating curves shown in Figure 3 and Figure 4.
i = 1 to 2 for Dual and 1 to 4 for Quad
V
I
V
Application
I
SMAX
LOAD
S
OUT
= Total Supply Voltage
P
P
D MAX
D MA X
i = Maximum Output Voltage of the
i = Load current
= Maximum Supply Current Per Amplifier
=
=
Σi V
Σi V
[
[
S
LOAD
S
DMAX
×
×
I
I
SMA X
SM AX
i to avoid device overheat. Fig-
equations equal to each other,
+
+
(
(
V
V
S
OU T
+ V
–
i V
–
OU T
S
- ) I
i ) I
DMAX
×
×
L OA D
L OA D
exceeds
i
i
]
]