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AM2302 digital temperature humidity sensor is a digital signal output with a calibrated temperature and humidity compound sensor. It is application specific digital module acquisition technology and the temperature and humidity sensing technology, ensure that the product has high reliability and excellent long-term stability. The sensor includes a capacitive humidity sensing element and a NTC temperature sensor, and is connected with a high performance 8 bit microcontroller. Each AM2302 sensor is calibrated in a very accurate humidity calibration laboratory. Calibration coefficients are stored in the form of a program in the OTP memory, to call these calibration coefficient process sensor signal detection in the internal. The single wire serial interface, so easy and fast system integration. Super small size, power consumption is very low, the signal transmission distance can reach more than 20 meters, which becomes the best choice of all kinds of application of even the most demanding of applications. Products for the 4 pin single row pin package. The connection is convenient, special packages can be provided in accordance with customer demand