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High-precision Single-BUS Digital Temperature Sensor
NS18B20 is a high-precision one wire temperature measurement chip with temperature sensor ranging from -55℃ to +125℃. According to user needs, digital conversion accuracy and temperature measurement speed can be set by configuring registers. The chip has built-in 5-byte non-volatile storage unit for users,3 bytes for high and low temperature alarm and accuracy configuration, and another 2 bytes for storing user-defined information. The maximum error is ±0.5℃ in the range from 10℃ to +85℃, and ±1℃ in the whole temperature range. NS18B20 has two working modes, namely, parasitic power supply and external power supply. The parasitic power supply can be powered by data line without external power supply. Each NS18B20 has a unique 64-bit serial number that allows multiple devices to be connected to the same BUS using an one wire port. Therefore, with this feature, a single processor can be used to control multiple NS18B20 sensors. NS18B20 is widely used in distributed temperature environment monitoring and temperature control system.
Product Features
• Single-BUS communication, saving wiring resources
• Each device has a unique serial number ID
• Wide temperature range 55℃ to 125℃
• Maintain high accuracy in full temperature range
-10℃~85℃：+0.5℃
- -55℃~10℃：±1℃
- 85℃~125℃：±1℃
• Conversion time is short, only 40ms
• No additional strong pull up is required for temperature conversion
• Temperature measurement range exceeding 100℃ and can be powered via digital interface
• Simple application, no additional components required
• Operating voltage range 2.7V~5.5V
• >±8KV(HBM) strong ESD protection
• Programmable 9-12 digit output
• Users can configure alarm threshold by themselves
• TO-92S package, with small size
Application
• Distributed temperature measurement
• Process monitoring and control system
• Industrial Internet of Things
• White household appliances
• Temperature monitoring
Functional Block Diagram
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