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BQ34Z100-G1: Internal Temp Sensor Way Off

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Part Number:BQ34Z100-G1

We are set up to use an internal temperature sensor. I have a 10k pulldown on the TS line. When we set the configuration to use the Internal Temp Sensor and calibrate, our read temperature is way off. 

When our set temp is 22C, our read calibrated temp is ~45C

When our set temp is 2C (which is known to be wrong, our room is actually 22C), our read calibrated temp is closer to ~25C

I am curious why there is this massive offset and why we have to lie to the chip in order to get the temperature sensor within an acceptable range? 

The error is not even close to within tolerance given by the datasheet


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