In today's society, temperature sensors can be said to be ubiquitous. Air conditioning systems, refrigerators, rice cookers, electric fans and other home appliances, as well as handheld high-speed and high-efficiency computers and electronic equipment, all need to provide temperature sensing functions. Taking a computer as an example, the faster the CPU runs, the more heat it dissipates. In order to prevent the computer system from being damaged by overheating, the system must strengthen the overheating protection function. On the other hand, if the system performs high-speed wireless transmission, it is necessary to provide temperature compensation due to frequency shift. The traditional temperature sensor method is limited by its package size, linear performance or accuracy, but the current temperature sensor chip not only has low power consumption and high accuracy, but also has better linear performance than traditional temperature sensors. The most important point It is easy to use.

The chip development of temperature sensor has four directions: analog, digital, remote diode, and system monitor.

The analog output temperature sensor is suitable for use in cellular mobile phones. Since these types of phones are very sensitive to temperature, over or under temperature protection is very important.