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Methods to Reduce Thermistor Linearization Error, Memory, and Power Requirements

 

Most thermistors are highly non-linear over a wide operating temperature range. In many cases, thermistor linearization over a wide temperature range proves to be a challenge. For example, in some automotive applications, the operating temperature can vary from –40°C to 150°C. Linearization in this range is not without significant system tradeoffs. This ultimately affects system requirements such as temperature accuracy, power, and memory size. Understanding how linearity affects these key system tradeoffs can help system designers take advantage of the linear TMP61 thermistor for wide-operating-temperature applications.