My Comment was based on the fact that a Wheatstone Bridge can swing negative and is equally likely to do so as to swing positive and on top of that... If you are after ~1% accuracy it still requires a Very Clean, Stable and known Reference Bias for the sensor... Then there is the issue of the accuracy of the Vref, nominally 5V or the chip Vcc. This forces a ratiometric measurement because the Vcc line might not be very stable or accurate. There are similar issues with the internal 1.1?V reference... it seems that it can vary somewhat. So I made these assumptions about the use of the thermistor because there are many ways to achieve that level of accuracy but the temperatures are lower, the thermistor can be limited only (reasonably) by the melting point of the solder... Not all or many but possible. So those thoughts first I thought to recommend a voltage source stable enough that it could through the proper voltage divider be the Vref for the measurements as well as the Thermistor Reference bias... that was to come after he gave me some indication that he understood my thoughts and was interested.
Doc