LM4864MM datasheet(3/10 Pages) NSC

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Electrical Characteristics(Note 1) (Note 2) (Continued)

Note 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum

allowable power dissipation is PDMAX = (TJMAX −TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4864, TJMAX = 150˚C.

The typical junction-to-ambient thermal resistance, when board mounted, is 230˚C/W for package number MUA08A, 170˚C/W for package number M08A and is

107˚C/W for package number N08E.

Note 4: Human body model, 100 pF discharged through a 1.5 k

Ω resistor.

Note 5: Machine Model, 220 pF–240 pF discharged through all pins.

Note 6: Typicals are measured at 25˚C and represent the parametric norm.

Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).

Note 8: The quiescent power supply current depends on the offset voltage when a practical load is connected to the amplifier.

Note 9: The MUA08BA package is thermally limited to 595 mW of power dissipation at room temperature. Refering to the Power Dissipation vs Output Power graph

in the Typical Performance Characteristics section, the power dissipation limitation for the package occurs at 300 mW of output power. This package limitation is

based on 25˚C ambient temperature and

θJA = 210˚C. For higher output power possibilities refer to the Power Dissipation Section.

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