Tool/software:
When using the formula from the datasheet:
V25 = 1.200 V (nominal)
VTSX = (ADC in Decimal) x 382 μV/LSB
TEMPDIE = 25° – ((VTSX – V25) ÷ 0.0042)
The value isn't inside the expected range. An example output is DieTEmp = -285044448.00. The expected temperature is around 24°C the ADC value is 3134.