4 Summary

In the air-conditioning system, the performance of the temperature sensors is very important. Different installation positions are needed to measure different temperature ranges. Due to the nonlinear problem of traditional NTC thermistors, different types of NTCs are required to meet the needs of different temperature ranges, makes material management very complex. TI’s TMP61 linear temperature sensor is a silicon-based thermistor, the resistance value and temperature are almost linear, which simplifies the software design, and can complete high-resolution temperature detection at different positions with one type of chip, TMP61. At the same time, the response time of the silicon-based PTC thermistor is faster than that of the NTC thermistor, which is beneficial to improve the working efficiency of the air conditioner. In addition, the smaller resistance tolerance and drift of silicon-based thermistor is beneficial to the reliability of long-term operation of the air-conditioning system.

In addition to the silicon-based thermistor TMP61, TI also provides a digital temperature and humidity sensors, HDC3020 with a temperature accuracy of up to 0.1°C and a humidity detection range of 0% to 100%. This series of temperature and humidity sensors also has a variety of models, such as HDC3021 with a removable tape cover, HDC3022 with permanent IP67 filter. For different scenarios, HDC302x provides users with more choices.