The DS18B20 temperature sensor is 9 bit to 12 bit A/D conversion accuracy. The DS1820 temperature sensor is 9 bit A/D conversion accuracy.
DS18B20, DS1822 "1-wire bus" digital temperature sensor, DS1820, DS18B20 also supports the "1-wire bus" interface, the temperature range of measurement is - 55 [C ~ + 125] C, in the range of - 10 ~ + 85 [C], the accuracy is [0.5] 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. The characteristics of DS18B20 and DS1822 can be programmed to set the resolution of 9~12 bit, and the precision is + 0.5 degree C (DS18B20). Optional smaller package, wider voltage range. The resolution setting and user set alarm temperature are stored in EEPROM and remain after power failure.
The performance of DS18B20 is the best among the new generation products. The performance price ratio is excellent. 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. Following the early product of "1-wire bus", DS1820 has opened up a new concept of temperature sensor technology. DS18B20 and DS1822 offer more options for voltage, characteristics and packaging, allowing us to build our own economical temperature measurement system.