In the world of temperature sensors, size is not king. Texas Instruments LMT01 is able to cut itself down to but to pins.
In principle, the LMT01 is based on the concept of the current loop-if you have never heard of this concept before, refer to classics such as industrial control electronics by Jacob. Texas Instruments does, however, spruce the part up by guaranteeing a maximum accuracy of but 0.5°C. In addition to that, the component also has extremely fine resolution.
When performing the old comparison of LMT01 versus DS18B20, keep in mind that the OneWire bus allows you to connect more than one temperature sensor to one pin. When using the Ti part, this - obviously - is not possible. However, Texas Instruments supports developers with an LMT01 evaluation board also known under the part number LMT01EVM.