"24V DC Cooling Fan" temperature sensor with digital integrated temperature sensor, the circuit shown in Figure 2. It does not require any external components in use. Its high degree of integration greatly reduces the error factors external amplification conversion circuits, and the temperature error is small, "24V DC Cooling Fan" high resolution; the measured temperature value can be converted into a digital output directly within the device, simplifying the system program design; and the use of advanced single-bus technology, has strong anti-jamming capability. Thus the use of "24V DC Cooling Fan" makes the system structure more simple, more reliable. Temperature measurement accuracy, conversion time, transmission distance, resolution, and other aspects can meet fans temperature detection.