DS18B20 TO-92 Temperature Sensor

The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire¨ bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of -55¡C to +125¡C and is accurate to ±0.5¡C over the range of -10¡C to +85¡C. In addition, the DS18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.

Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems.

APPLICATIONS:

• Thermostatic controls
• Industrial systems
• Consumer products
• Thermometers
• Thermally sensitive system

Features:

• Calibrated directly in ¡ Celsius (Centigrade)
• Unique 1-wire interface requires only one port pin for communication
• Each device has a unique 64-bit serial code stored in an onboard ROM
• Multi-drop capability simplifies distributed temperature sensing applications
• Requires no external components
• Can be powered from the data line. The power supply range is 3.0V to 5.5V
• Measures temperatures from Ð55¡C to +125¡C (Ð67¡F to +257¡F)
• ±0.5¡C accuracy from Ð10¡C to +85¡C
• 12-bit thermometer resolution
• Converts temperature in 750 ms (max.)

Package Includes:

• 1 x DS18B20 TO-92 Temperature Sensor