DS18B20X
Overview
The DS18B20X Digital Thermometer provides 9 to 12-bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20X communicates over a 1-wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor.
- Unique 1-wire interface requires only one port pin for communication Each device has a unique 64-bit serial code stored in an on-board ROM Multi-drop capability simplifies distributed temperature sensing applications Requires no external components Can be powered from data line. Power supply range is 3.0V to 5.5V Measures temperatures from -55°C to +125°C (-67°F to +257°F) ±2.0°C accuracy from 0°C to +70°C Thermometer resolution is user-selectable from 9 to 12 bits Converts temperature to 12-bit digital word in 750 ms (max.) User-definable nonvolatile alarm settings Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition) Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system