The XBLW DS18B20 is a digital thermometer that offers temperature measurement with a resolution of 9 to 12 bits. It can program temperature lower and upper limit alarms via programmable non-volatile memory units. The XBLW 18B20 communicates with a host computer using a single-bus protocol, requiring only one signal line and one ground line. It has a temperature measurement range of -55°C to +125°C, with a testing accuracy of ±0.4°C within the range of -10°C to +70°C. Additionally, it can operate in parasitic power mode, directly powered through the signal line without requiring an additional power supply. Each XBLW 18B20 has a globally unique 64-bit serial number, allowing multiple XBLW 18B20s to be daisy-chained on the same single bus for networked operation, requiring only one processor to control multiple XBLW 18B20s distributed over a wide area.

01—Main Features

· Single-bus interface requiring only one port pin for communication.

· Temperature conversion speed below 400ms at up to 12-bit precision.

· User-defined non-volatile temperature alarm settings.

· Multi-point distributed temperature sensing capability.

· Device identification and labeling of temperature exceeding program-set values through alarm search commands.

· No external components required.

· Exceptional electrostatic discharge protection: HBM 8000V MM 800V.

· Power supply through the data line; voltage range from 2.5V to 5.5V.

· Available in surface-mount MSOP8 and 3-pin TO-90 packages.

· Temperature measurement range from -55°C to +125°C (-67°F to +257°F).

· Applications include temperature control, industrial systems, consumer products, grain temperature monitoring, thermometers, or any thermal sensing systems.

· Accuracy of ±0.4°C within the range of -10°C to +70°C.

· Temperature resolution selectable from 9 to 12 bits.

02—Package and Pin Definitions

XBLW DS18B20内部方框图

03—Power Supply Description

Strong Pull-Up Power During Temperature Conversion of XBLW DS18B20 (Parasitic Power Mode)

External Power Supply Mode for XBLW DS18B20

Multi-Point Temperature Sensing Circuit for XBLW DS18B20

03—Partial Application Scenarios Examples

Pharmaceutical Factory Warehousing

Refrigerated Storage Measurement

Water Temperature Detection Device

XBLW DS18B20 is a smart integrated digital temperature sensor known for its excellent performance, ease of use, and consistency. The multi-point temperature measurement system formed by it boasts high measurement accuracy, good stability, simple structure, flexible configuration, low cost, easy scalability, long transmission distance, and strong anti-interference capabilities. It has a wide range of applications in large-scale temperature multi-point monitoring systems, promising extensive prospects.