I need good accuracy in the 75°C to 100°C range.
Reading through Freescale's (NXP) Application Note AN3031, I see the following table:
I am uncalibrated and using fixed-point. Say my "actual" temperature is 82°C. So what exactly does this ±18°C mean?
1) Does this ±18°C represent an error across the entire temperature range, or just the extremities (25C has much less error whereas 85C has ±18°C)???
2) Is this accuracy within the same chip (my sampled readings can range from 64°C to 100°C when the actual temperature is 82°C), or does it represent the error from chip to chip, or even reel to reel?