DAC8822: Power dissipation and thermal resistance (RthetaJC) of DAC8822

Hi Prasanna,

Thank you for your query. The power dissipation of the DAC is given by:

Pd = Vdd*Idd + Vref^2/Rref + (Vdd - Vout1)*Iout1 + + (Vdd - Vout2)*Iout2

where,
Pd = Power dissipation
Vdd = Power supply voltage
Idd = Quiscent supply current
Vref = Reference voltage
Rref = Reference input resistance
VoutX = DAC output voltage for channel X
IoutX = DAC output current for channel X

As the device is not primarily used for high-power dissipation, the R-theta-jc has not been characterized. However, if you could tell me about your specific requirement, we can probably suggest some indicative value.

Regards,
Uttam sahu
Applications Engineer, Precision DACs