THS4281 Datasheet, PDF (32/43 Pages) Texas Instruments – VERY LOW-POWER, HIGH-SPEED, RAIL-TO-RAIL INPUT AND OUTPUT VOLTAGE-FEEDBACK OPERATIONAL AMPLIFIER

THS4281
SLOS432B – APRIL 2004 – REVISED OCTOBER 2015
Thermal Considerations (continued)
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1.8
1.6
8-pin SOIC (D) Package
1.4
8-pin MSOP
1.2
(DGK) Package
1
0.8
0.6
0.4
0.2
5-pin SOT23
(DBV) Package
0
−40 −20 0 20 40 60 80 100
T_A − Free-Air Temperature − °C
Θ_JA = 97.5°C/W for 8-Pin SOIC (D)
Θ_JA = 180.8°C/W for 8-Pin MSOP (DGK)
Θ_JA = 255.4°C/W for 5-Pin SOT−23 (DBV)
T_J = 125°C, No Airflow
Figure 80. Maximum Power Dissipation vs Ambient Temperature
When determining whether or not the device satisfies the maximum power dissipation requirement, it is important
to consider not only quiescent power dissipation, but also dynamic power dissipation. Often maximum power
dissipation is difficult to quantify because the signal pattern is inconsistent, but an estimate of the RMS value can
provide a reasonable analysis.
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