SLOS887E September 2014 – December 2018 TMP112-Q1
The superior accuracy that can be achieved with the TMP112-Q1 device is complemented by the immunity-to-DC variations from a 3.3-V supply voltage. This immunity is important because it spares the user from having to use another LDO regulator to produce 3.3 V to achieve accuracy. Nevertheless, the noise quantization that results from changing supply can add some slight change in temperature measurement accuracy. As an example, if the user chooses to operate the device at 1.8 V, the worst-case expected change in accuracy can be calculated with Equation 14:
This example is a worst-case accuracy contribution as a result of variation in power supply that must be added to the accuracy plus the slope maximum.