product description

NS18B20 is a high-precision single-bus temperature measurement chip. The temperature sensor has a temperature measurement range of - 55 ° C to+125 ° C. Digital conversion accuracy and temperature measurement speed can be set by configuring registers according to user needs. The chip has a built-in 5-byte nonvolatile memory unit for users, 3-byte for high and low temperature alarm and configuration accuracy, and 2-byte for saving user-defined information. The maximum error is ± 0.5 ° C in the range of - 10 ° C to+85 ° C, and ± 1 ° C in the full temperature range. The NS18B20 has two modes of operation: parasitic power supply and external power supply. The parasitic power supply can be powered through the data line without external power supply.

Each NS18B20 has a unique 64-bit serial number. The single bus interface allows multiple devices to be connected to the same bus. Therefore, this feature can use one processor to control multiple NS18B20 sensors. NS18B20 is widely used in distributed temperature environment monitoring, temperature control and other systems.

major function

●  Single-bus communication, saving wiring resources

●  Each device has a unique serial number ID

●  Wide temperature range – 55 ° C to 125 ° C

●  Maintain high accuracy in full temperature range

-10°C~85°C：±0.5℃

-55℃~--10℃：±1℃

85℃~125℃：±1℃

● Short conversion time, only 40ms

●  No additional strong pull-up is required for temperature conversion

●  Parasitic mode operation is supported when the temperature is higher than 100 ℃

●  Simple application without additional devices

●  Working voltage range: 2.7V~5.5V

●  Programmable 9~12 bits

●  The user can configure the alarm value

●TO-92S package, small size

Application

●  Distributed temperature measurement

●  Process monitoring and control system

●  Industrial Internet of Things

●  White appliances

●  Temperature monitoring

Function block diagram