Microchip's latest temperature sensor provides high temperature accuracy of +0.25°C (typical) and  +/- 1°C from -40 to +125°C, as well as static current consumption of just 200µA (typ). 

Available in 8-pin MSOP and 2x3mm DFN packages, the I2C device features programmable shutdown to extend battery life.

There is also an alert feature for over- and under-temperature window monitoring; and a critical temperature-alert feature that provides over-temperature protection, helping to further lengthen system life.