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HomeCommunitySubjectDS18B20 1-Wire Digital Thermometer:Pinout, Datasheet, and Applications

DS18B20 1-Wire Digital Thermometer:Pinout, Datasheet, and Applications

MAXIM INTEGRATED PRODUCTS DS18B20+. 12bit,0.5C 1 Wire Digital Thermometer with Programmable Resolution in TO-92-3 Package Hey Guys, this time i wanna introduce you all a very useful thing called DS18B20 which communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor.

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Sep 7, 2021

Ernest Brewster

DS18B20 Arduino Temperature Sensor - How to Tutorial

 

MAXIM INTEGRATED PRODUCTS DS18B20 . 12bit,0.5C 1 Wire Digital Thermometer with Programmable Resolution in TO-92-3 Package

Hey Guys, this time i wanna introduce you all a very useful thing called DS18B20 which communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. In addition, the DS18B20 can derive power directly from the data line (“parasite power”),eliminating the need for an external power supply.

DS18B20

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DS18B20 Descriptions

The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. In addition, the DS18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. 

 

Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems.

DS18B20 Pinout

DS18B20 CAD Model

DS18B20 Symbol

DS18B20 Footprint

DS18B20 3D Model

DS18B20 Features

● Unique 1-Wire® Interface Requires Only One Port Pin for Communication 

● Reduce Component Count with Integrated Temperature Sensor and EEPROM 

   • Measures Temperatures from -55°C to +125°C (-67°F to +257°F) 

   • ±0.5°C Accuracy from -10°C to +85°C 

   • Programmable Resolution from 9 Bits to 12 Bits 

   • No External Components Required 

● Parasitic Power Mode Requires Only 2 Pins for Operation (DQ and GND) 

● Simplifies Distributed Temperature-Sensing Applications with Multidrop Capability 

   • Each Device Has a Unique 64-Bit Serial Code Stored in On-Board ROM 

● Flexible User-Definable Nonvolatile (NV) Alarm Settings with Alarm Search Command Identifies Devices with Temperatures Outside Programmed Limits 

● Available in 8-Pin SO (150 mils), 8-Pin µSOP, and 3-Pin TO-92 Packages

Specifications

Maxim Integrated DS18B20+ technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated DS18B20+.

DS18B20 Tech Specifications

Maxim Integrated DS18B20 technical specifications, attributes, parameters and parts with similar specifications to Maxim Integrated DS18B20 .

Product Attribute Attribute Value
Factory Lead Time7 Weeks
MountPCB, Through Hole
Mounting TypeThrough Hole
Package / CaseTO-226-3, TO-92-3 (TO-226AA)
Number of Pins3Pins
Weight453.59237mg
Test Conditions-10°C ~ 85°C (-55°C ~ 125°C)
Operating Temperature-55°C~125°C
PackagingBulk
Published2000
JESD-609 Codee3
Pbfree Codeyes
Part StatusActive
Moisture Sensitivity Level (MSL)1 (Unlimited)
Product Attribute Attribute Value
Number of Terminations3Terminations
TerminationSMD/SMT
ECCN CodeEAR99
Terminal FinishMatte Tin (Sn)
Voltage - Supply3V~5.5V
Base Part NumberDS18B20
Output Type1-Wire®
InterfaceSerial
Operating Supply Current1.5mA
Nominal Supply Current1mA
Output Current4mA
Number of Bits12Bits
Resolution12 b
Sensor TypeDigital, Local
Product Attribute Attribute Value
Max Supply Voltage (DC)5.5V
Min Supply Voltage (DC)3V
HousingPLASTIC
Accuracy - Highest (Lowest)±0.5°C (±2°C)
Sensing Temperature - Local-55°C~125°C
Accuracy-Max0.5 Cel
FeaturesOutput Switch, Programmable Limit, Programmable Resolution
Height4.95mm
Length4.95mm
Width3.94mm
REACH SVHCNo SVHC
Radiation HardeningNo
RoHS StatusROHS3 Compliant
Lead FreeLead Free
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DS18B20 Functional Block Diagram

DS18B20 Functional Block Diagram

DS18B20 Electrical Characteristics

DS18B20 Electrical Characteristics

DS18B20 Manufacturer

Maxim Integrated, a subsidiary of Analog Devices, designs, manufactures, and sells analog and mixed-signal integrated circuits for the automotive, industrial, communications, consumer, and computing markets. Maxim's product portfolio includes power and battery management ICs, sensors, analog ICs, interface ICs, communications solutions, digital ICs, embedded security, and microcontrollers. The company is headquartered in San Jose, California, and has design centers, manufacturing facilities, and sales offices worldwide

Datasheet PDF

Download datasheets and manufacturer documentation for Maxim Integrated DS18B20+.

DS18B20 Documents

Download datasheets and manufacturer documentation for DS18B20

Frequently Asked Questions

How does a DS18B20 work?
The DS18B20 is one type of temperature sensor and it supplies 9-bit to 12-bit readings of temperature. These values show the temperature of a particular device. The communication of this sensor can be done through a one-wire bus protocol which uses one data line to communicate with an inner microprocessor.
What type of temperature sensor is DS18B20?
The core functionality of the DS18B20 is its direct-to- digital temperature sensor. The resolution of the tempera- ture sensor is user-configurable to 9, 10, 11, or 12 bits, corresponding to increments of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C, respectively. The default resolution at power-up is 12-bit.
How accurate is DS18B20?
Meanwhile after the calibration using the proposed method, the DS18B20 sensor has a smaller mean error of ± 0.85 %, so that obtained a more accurate sensor and it can be used for testing of Grashof Portable Incubator made by University of Indonesia. Temperature is one of the main parameters in a baby incubator.
What type is DS18B20?
DS18B20 is 1-Wire interface Temperature sensor manufactured by Dallas Semiconductor Corp. The unique 1-Wire® Interface requires only one digital pin for two way communication with a microcontroller.
FAQ
How does a DS18B20 work?
The DS18B20 is one type of temperature sensor and it supplies 9-bit to 12-bit readings of temperature. These values show the temperature of a particular device. The communication of this sensor can be done through a one-wire bus protocol which uses one data line to communicate with an inner microprocessor.
What type of temperature sensor is DS18B20?
The core functionality of the DS18B20 is its direct-to- digital temperature sensor. The resolution of the tempera- ture sensor is user-configurable to 9, 10, 11, or 12 bits, corresponding to increments of 0.5°C, 0.25°C, 0.125°C, and 0.0625°C, respectively. The default resolution at power-up is 12-bit.
How accurate is DS18B20?
Meanwhile after the calibration using the proposed method, the DS18B20 sensor has a smaller mean error of ± 0.85 %, so that obtained a more accurate sensor and it can be used for testing of Grashof Portable Incubator made by University of Indonesia. Temperature is one of the main parameters in a baby incubator.
What type is DS18B20?
DS18B20 is 1-Wire interface Temperature sensor manufactured by Dallas Semiconductor Corp. The unique 1-Wire® Interface requires only one digital pin for two way communication with a microcontroller.

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