ISL70218SEH INTERSIL [Intersil Corporation], ISL70218SEH Datasheet - Page 17

• Manufacturer Part Number: ISL70218SEH
• Description: Rad Hard Dual 36V Precision Single-Supply, Rail-to-Rail Output, Low-Power Operational Amplifiers
• Manufacturer: INTERSIL [Intersil Corporation]

Power Dissipation
It is possible to exceed the +150°C maximum junction
temperatures under certain load and power supply conditions. It
is therefore important to calculate the maximum junction
temperature (T
supply voltages, load conditions, or package type need to be
modified to remain in the safe operating area. These parameters
are related using Equation 1:
where
• PD
• T
• Θ
PD
where
• PD
• V
• I
• V
• R
T
PD
JMAX
each amplifier in the package (PD
MAX
qMAX
MAX
MAX
S
OUTMAX
L
JA
MAXTOTAL
MAX
= Total supply voltage
= Load resistance
= Thermal resistance of the package
=
for each amplifier can be calculated using Equation 2:
= Maximum ambient temperature
=
= Maximum quiescent supply current of one amplifier
T
= Maximum power dissipation of one amplifier
V
MAX
= Maximum output voltage swing of the application
S
×
is the sum of the maximum power dissipation of
JMAX
+
I
qMAX
θ
JA
) for all applications to determine if power
xPD
+
(
V
MAXTOTAL
S
- V
OUTMAX
17
MAX
)
×
V
------------------------
)
OUTMAX
R
L
ISL70218SEH
(EQ. 1)
(EQ. 2)
August 24, 2012
FN7957.1