The measuring temperature range is -55 degrees C~+125 degrees C, and the accuracy is within 0.5 degrees C in the range of -10~+85 C. The accuracy of DS1822 is less than 2 degrees C. The field temperature is transmitted directly by the digital mode of "one-wire bus", which greatly improves the anti-interference ability of the system. It is suitable for on-site temperature measurement in harsh environment, such as environmental control, equipment or process control, temperature measurement consumer electronic products, etc. Unlike the previous generation, the new product supports a voltage range of 3V to 5.5V, making the system design more flexible and convenient. And the new generation of products is cheaper and smaller.
DS1820, DS18B20, DS1822, and so on support the "1-wire bus" interface.
DS1822 is compatible with DS18B20 software and is a simplified version of DS18B20. EEPROM, which saves user-defined alarm temperature and resolution parameters, is omitted. The precision is reduced to (?) 2 (?) C. It is suitable for applications with low performance requirements and strict cost control. It is an economical product. The performance of DS18B20 is the best among the new generation products.
DS18B20 internal structure mainly consists of four parts: 64-bit lithography ROM, temperature sensor, non-volatile temperature alarm trigger TH and TL, configuration register.