Description
Product Overview
The DS18B20 Temperature Sensor provides 9-bit to 12-bit Celsius temperature measurements. Additionally, it 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
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.
Features of Temperature Sensor
- Each Device has a Unique 64-Bit Serial Code Stored in an On-Board ROM.
- Multidrop Capability Simplifies Distributed Temperature-Sensing Applications.
- Requires No External Components.
- Power can be supplied from data Line,and the Power Supply Range is 2.5V to 5.5V
- Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
- ±0.4°C Accuracy from -10°C to +70°C
- Thermometer Resolution is User Selectable from 9 to 12 Bits
- Converts Temperature to 12-Bit Digital Word in 400ms (Max)
- User-Definable Nonvolatile (NV) Alarm Settings
- Alarm Search Command Identifies and Addresses Devices Whose Temperature is Outside Programmed Limits
Applications
Used in Thermostatic Controls, Industrial Systems, Consumer Products, Thermometers, or Any Thermally Sensitive System.
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