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Shown here is a comparison of three types of solutions that come to mind when thinking about temperature measurements. The first solution consists of ICs that measure local temperature or temperature of itself (using an onboard sensor, usually a diode) and output a voltage proportional to temperature. The market is flooded with these simple 4- or 6-pin devices that are easy to use, cheap, and provide relatively low accuracy readings around ±3°C. The second category consists of ICs that measure remote temperature and take advantage of the higher accuracy and wider range of other sensors, not just diodes. For many high-end temperature monitoring applications, designers ultimately implement the third category, discrete solutions, because accuracy requirements can be met and the exact combination of sensors can be measured. However, as with any discrete solution, component count, complexity and costs are much higher than an integrated solution. The LTC2983 competes with these high-end discrete solutions, as readers will see in the upcoming slides.
