The LM135, LM235 and LM335 are precision temperature sensors which can be easily calibrated. They work as a 2-terminal zener and the breakdown voltage is directly proportional to the absolute temperature of 10 mV/K Precision temperature sensor Enclosure: SO-8 https://elecena.pl/product/9695436/lm335am-nopb-temperature-sensor-so-8 2017-08-05 https://elecena.pl/product/9695436/lm335am-nopb-temperature-sensor-so-8 2018-12-16 https://elecena.pl/product/9695436/lm335am-nopb-temperature-sensor-so-8 2021-04-28 https://elecena.pl/product/9695436/lm335am-nopb-temperature-sensor-so-8 2022-12-10