Description

The DS18B20 digital thermometer provides temperature measurement with a resolution of 9 to 12 bits, and canachieve lower and upper temperature limit alarms through programmable non-volatile storage units.DS18B20 uses a single bus protocol to communicate with the upper computer, requiring only one signal line andone ground line. Its temperature measurement range is -55 'C ~ +125 °c, The testing accuracy within the rangeof -10 9C w +70 'C can reach + 0.4 'c, In addition, it can also operate in parasitic mode, directly supplyingpower to the chip through signal lines without the need for additional power supply.Each DS18B20 has a globally unique 64 bit serial number, which allows multiple 18B20s to be connected in serieson the same single bus for networking. With just one processor, multiple DS18B20s distributed over a large areacan be controlled.

This networking method is particularly suitable for HVAC environmental control, building, equipment, graintemperature measurement, industrial temperature measurement, and process monitoring and controlapplications.

Features

1-Wire Interface Requires Only One Port Pin for CommunicationEach Device has a Unique 64-Bit Serial Code Stored in an On-Board ROMMultidrop Capability Simplifies Distributed Temperature-Sensing ApplicationsRequires No External components

Can Be Powered from Data Line; Power Supply Range is 2.5V to 5.5vMeasures Temperatures from -55°C to +125°C(-67°F to +257°F)+0.4'C Accuracy from -10°℃ to +70°CThermometer Resolution is User Selectable from 9 to 12 Bitsconverts Temperature to 12-Bit Digital Word in 400ms(Max)User-Definable Nonvolatile (NV) Alarm Settings.RAlarm Search Command Identifies and Addresses Devices Whose Temperature is OutsideProgrammed Limits

ESD Rating: HBM8000V,MM800V

Available in T0-92,SOP-8 and MSOP-8 Packages