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.
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.
- Supply voltage : 3.0 – 5.5V
- Supply current : 1 – 1.5mA
- Accuracy : ± 0.5 (-10°C to +85°C), ± 2 (-55°C to +125°C)
- Resolution bit : 12bit
- Package type : TO-92
- Pins : 3
- Operating temperature range : -55°C to +125°C
- Output Type : Digital