Are these numbers temperatures? F or C? 8000 is quite warm in either. What is the application: Body (contact) fluid (immersion) spectrometer or infrared? E
Just to say, that circuit uses old DS1620 digital sensor. Its thermometer and thermostat IC which production is under question and some versions of that family is not recommended for new design. This IC can measure up to 125°C, but IC body can melt in direct contact with hot material.