Temperature sensor is can feel temperature translates into usable output signal of the sensor.
The temperature sensor
is the core part of the temperature measuring instrument, wide variety.
According to measuring methods could be divided into two types: contact and non-contact, according to the sensor material and electronic component features divided into two categories, thermal resistance and thermocouple.
Integrated temperature sensor as a result of the p-n junction transistor forward voltage drop is about -
2 mv % 2 f ℃ in the slope changes with temperature, and relatively stable, at the same time the transistor base emitter voltage and temperature is basically linear relationship, it can use the particularity of temperature measurement.
The basic working principle of integrated temperature sensor + the temperature measuring transistor and excitation circuit, amplifying circuit, integrated on a small silicon chip, will constitute the integrated temperature sensor.
Compared with other temperature measurement sensor, it has high linearity, high precision, small volume, fast response, low price advantages;
The disadvantage is that narrow temperature range, is commonly -
+ type integrated temperature sensor output current, the output of the integrated temperature sensor output voltage and current output two categories, among them the application of current output type is more extensive.
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