DS18B20 Digital Temperature Sensor0 pages

USTSensor

•UST18B20

Digital Temperature Sensor UST18B20

DESCRIPTION

The DS18B20 Digital Thermometer provides 9 to 12-bit (confi-

gurable) temperature readings which indicate the temperature

of the device.

nformation is sent to/from the DS18B20 over a 1 -Wire interfa-

ce, so that only one wire (and ground) needs to be connected

from a central microprocessor to a DS18B20. Power for readi-

ng, writing, and performing temperature conversions can be d-

erived from the data line itself with no need for an external po-

wer source.

Because each DS18B20 contains a unique silicon serial num-

ber, multiple DS18B20s can exist on the same 1-Wire bus. Th-

s allows for placing temperature sensors in many different pl-

aces. Applications where this feature is useful include HVAC

environmental controls, sensing temperatures inside building,

equipment or machinery, and process monitoring and control.

FEATURES

■ Unique 1-Wire interface requires only one port pin for communication

■ Multidrop capability simplifies distributed temperature sensing applications

■ Requires no external components

■ Can be powered from data line. Power supply range is 3. OV to 5. 5V

■ Zero standby power required

■ Measures temperatures from -55t to+125t. Fahrenheit equivalent is -67°F to+257°F

■ +0. 5t accuracy from -1 0t to +85t

■ Thermometer resolution is programmablefrom 9 to 12 bits

■ Converts 12-bit temperature to digital word in 750 ms (max.)

■ User-definable, nonvolatile temperature alarm settings

■Alarm search command identifies and addresses devices whose temperature is outside of programmed limits

(temperature alarm condition)

■Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally

sensitive system

PIN ASSIGNMENT

KOTTOM Vll-W

TUV

a a a

z a a

a >

DSI 8R20 To-92

Package

NCQE

DQQE

8 Tn NC

7 IOJNC

8 TT1 NC

5 | | |GND

DS18B20Z

8-Pin SOIC(150mi1)

PIN DESCRIPTION

GND - Ground

DQ - Data In/Out

VDD- Power Supply Voltage

NC - No Connect

USTSensor technic Co.,LTD

Add: Eastlake Hi-Tech Development zone, Wuhan

Tel :+0086(27)-87531645/87531655

Fax :+0086(27)-87531665

E-Mail: ust@ustsensor.com

Visit ourwebsite: www.ustsensor.com

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