Junction temperature of op amps

How do I calculate the junction temperature of the AD8603?

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  • 0
    •  Analog Employees 
    on Jan 28, 2011 2:24 AM

    Tj = Ta + ( Pd * THETAja)

    where:

    Tj = junction temperature

    Ta = ambient temperature

    Pd = total power dissipation

    THETAja = junction-ambient thermal resistance

    Thermal resistance is highly package dependent. Please look up the Thermal Resistance table (Table 4) that we include in every op amp data sheet. Also, make sure that you do not violate any temperature range in the absolute maximum ratings table (Table 3).

    MT-093 explains some thermal design basics and provides very useful information.

    http://www.analog.com/static/imported-files/tutorials/MT-093.pdf

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  • 0
    •  Analog Employees 
    on Jan 28, 2011 2:24 AM

    Tj = Ta + ( Pd * THETAja)

    where:

    Tj = junction temperature

    Ta = ambient temperature

    Pd = total power dissipation

    THETAja = junction-ambient thermal resistance

    Thermal resistance is highly package dependent. Please look up the Thermal Resistance table (Table 4) that we include in every op amp data sheet. Also, make sure that you do not violate any temperature range in the absolute maximum ratings table (Table 3).

    MT-093 explains some thermal design basics and provides very useful information.

    http://www.analog.com/static/imported-files/tutorials/MT-093.pdf

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