ISL28195 Intersil Corporation, ISL28195 Datasheet - Page 14

• Manufacturer Part Number: ISL28195
• Description: (ISL28194 / ISL28195) Rail-to-Rail Input/Output (RRIO) Op Amps
• Manufacturer: Intersil Corporation

www.datasheet4u.com
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
to determine if power supply voltages, load conditions, or
package type need to be modified to remain in the safe
operating area. These parameters are related in Equation 1:
where:
• P
• PD
where:
• T
• θ
• PD
• V
• I
• V
• R
T
PD
JMAX
dissipation of each amplifier in the package (PD
Equation 2:
application
MAX
MAX
JA
MAX
DMAXTOTAL
S
OUTMAX
L
MAX
MAX
= Load resistance
= Supply voltage (Magnitude of V
= Thermal resistance of the package
=
= Maximum supply current of 1 amplifier
=
= Maximum ambient temperature
T
for each amplifier can be calculated as shown in
= Maximum power dissipation of 1 amplifier
2*V
MAX
= Maximum output voltage swing of the
S
+
×
is the sum of the maximum power
(
I
θ
SMAX
JA
xPD
+
MAXTOTAL
(
V
S
14
- V
OUTMAX
JMAX
)
+
) for all applications
and V
)
×
V
--------------------------- -
OUTMAX
-
)
R
L
MAX
ISL28194, ISL28195
(EQ. 2)
(EQ. 1)
)
October 9, 2007
FN6236.3