DS18B20、 DS1822 “一线总线”数字化温度传感器 同DS1820一样，DS18B20也 支持“一线总线”接口，测量温度范围为 -55°C~+125°C，在-10~+85°C范围内,精度为±0.5°C。-DS18B20, DS1822 " bus line"　with the DS1820 digital temperature sensor, like, DS18B20 also supports " bus line"　interface, the measurement temperature range of-55C ~+125C, at-10 ~+85C within an accuracy of 0.5 C.