About AD9432 ΘJc

Hi Yuya,

Thanks for your interest in AD9432.

For the 52-lead LQFP, the data sheet considers only the thetaJA since it determines the thermal characteristics of the package as a whole. The thetaJC is part of the thetaJA. Please see the tutorial note below. Hope this will help.

MT-093: Thermal Design Basics (analog.com)

Analog Devices : MS-2251: Data Sheet Intricacies - Absolute Maximum Ratings and Thermal Resistances

AN-892 Temperature Measurement Theory and Practical Techniques Application Note (Rev. 0) (analog.com)

Regards,

Xavier

Hi Yuya,

Thanks for your interest in AD9432.

For the 52-lead LQFP, the data sheet considers only the thetaJA since it determines the thermal characteristics of the package as a whole. The thetaJC is part of the thetaJA. Please see the tutorial note below. Hope this will help.

MT-093: Thermal Design Basics (analog.com)

Analog Devices : MS-2251: Data Sheet Intricacies - Absolute Maximum Ratings and Thermal Resistances

AN-892 Temperature Measurement Theory and Practical Techniques Application Note (Rev. 0) (analog.com)

Regards,

Xavier

Hi, Xavier

Thank you for your answer.

I refer to theta Ja.

Best regards,

Yuya