The Psi-jt for the AD9142A package is 0.11C/Watt.
AD9142A
Recommended for New Designs
The AD9142A is a dual, 16-bit, high dynamic range digital-to-analog converter (DAC) that provides a sample rate of 1600 MSPS, permitting a multicarrier...
Datasheet
AD9142A on Analog.com