EL8172(2007) Ver la hoja de datos (PDF) - Intersil

Número de pieza

componentes Descripción

Fabricante

EL8172
(Rev.:2007)

Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifiers

Intersil 

EL8171, EL8172

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 (TJMAX) for all applications

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 6:

TJMAX = TMAX + (θJAxPDMAXTOTAL)

(EQ. 6)

where:

• PDMAXTOTAL is the sum of the maximum power

dissipation of each amplifier in the package (PDMAX)

• PDMAX for each amplifier can be calculated as shown in

Equation 7:

PDMAX

=

2*VS × ISMAX + (VS

-

VOUTMAX

)

×

V-----O----U----T----M-----A----X--

RL (EQ.

7)

where:

• TMAX = Maximum ambient temperature

• θJA = Thermal resistance of the package

• PDMAX = Maximum power dissipation of 1 amplifier

• VS = Supply voltage (Magnitude of V+ and V-)

• IMAX = Maximum supply current of 1 amplifier

• VOUTMAX = Maximum output voltage swing of the

application

• RL = Load resistance

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13

FN6293.3

August 3, 2007

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