DS18B20
Programmable Resolution 1-Wire Digital Thermometer
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High-Precision Temperature Monitoring with Minimal Connections Ideal for Multisensor Systems
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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
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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.
Applications
- Consumer Products
- Industrial Systems
- Thermally Sensitive Systems
- Thermometers
- Thermostatic Controls
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
Search
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Support
Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
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DS18B20
Documentation
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Simple Software Validates the Hardware CRC and Detects Errors in the Serial Bit Stream of 1-Wire® Thermal Devices
Comparison of the DS18B20 and DS18S20 1-Wire® Digital Thermometers
Single-Wire Serial Bus Carries Isolated Power and Data
How to Use Packet-Error Checking to Secure Your Temperature Reading
Wirelessly Powering and Accessing a 1-Wire Network
Using Dallas' 1-Wire ICs in 1-Cell Li-Ion Battery Packs With Low-Side N-Channel Safety FETs Master
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
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| DS18B20+ |
TO92
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| DS18B20+PAR |
TO92
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| DS18B20+T&R |
TO92
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| DS18B20-SL+T&R |
TO92
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| DS18B20/GG8 |
TO92
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| DS18B20U+ |
Micro-MAX, Thin Shrink Small-Outline
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| DS18B20U+T&R |
Micro-MAX, Thin Shrink Small-Outline
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| DS18B20Z+ |
Small-Outline IC, Narrow (0.15in)
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| DS18B20Z+T&R |
Small-Outline IC, Narrow (0.15in)
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- DS18B20+
- Pin/Package Drawing
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TO92
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- DS18B20+PAR
- Pin/Package Drawing
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TO92
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- DS18B20+T&R
- Pin/Package Drawing
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TO92
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- DS18B20-SL+T&R
- Pin/Package Drawing
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TO92
- Documentation
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HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
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Ultra Librarian
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SamacSys
- DS18B20/GG8
- Pin/Package Drawing
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TO92
- Documentation
-
HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
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SamacSys
- DS18B20U+
- Pin/Package Drawing
-
Micro-MAX, Thin Shrink Small-Outline
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- DS18B20U+T&R
- Pin/Package Drawing
-
Micro-MAX, Thin Shrink Small-Outline
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- DS18B20Z+
- Pin/Package Drawing
-
Small-Outline IC, Narrow (0.15in)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- DS18B20Z+T&R
- Pin/Package Drawing
-
Small-Outline IC, Narrow (0.15in)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
Filter by Model
Part Models
Product Lifecycle
PCN
Apr 14, 2020
- 1998A
ASSEMBLY
DS18B20+
PRODUCTION
DS18B20+PAR
PRODUCTION
DS18B20+T&R
PRODUCTION
DS18B20-SL+T&R
PRODUCTION
DS18B20/GG8
PRODUCTION
Jan 22, 2020
- 1998N
ASSEMBLY
DS18B20+PAR
PRODUCTION
Jan 28, 2019
- 1753B
ASSEMBLY
DS18B20U+
PRODUCTION
DS18B20U+T&R
PRODUCTION
Oct 30, 2020
- 1702R2
ASSEMBLY
DS18B20Z+
PRODUCTION
DS18B20Z+T&R
PRODUCTION
Filter by Model
Part Models
Product Lifecycle
PCN
Apr 14, 2020
- 1998A
ASSEMBLY
DS18B20+
PRODUCTION
DS18B20+PAR
PRODUCTION
DS18B20+T&R
PRODUCTION
DS18B20-SL+T&R
PRODUCTION
DS18B20/GG8
PRODUCTION
Jan 22, 2020
- 1998N
ASSEMBLY
Jan 28, 2019
- 1753B
ASSEMBLY
Oct 30, 2020
- 1702R2
ASSEMBLY
Software & Part Ecosystem
| Parts | Product Life Cycle | Description | ||
|---|---|---|---|---|
|
1-Wire Temperature Sensors2 |
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PRODUCTION |
1-Wire Parasite-Power Digital Thermometer |
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PRODUCTION |
Econo 1-Wire Digital Thermometer |
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Can't find the software or driver you need?
Request a Driver/SoftwareEvaluation Kits 2
DS18B20EVKIT
Evaluation System for the DS18B20
Product Detail
The DS18B20 evaluation system (EV system) demonstrates the DS18B20 1-wire thermometer. The DS18B20 EV system consists of the DS18B20 evaluation kit (EV kit) and the USB2PMB2 adapter board. Windows XP® and Windows® 7/8/8.1/10 compatible software provides a user-friendly interface that demonstrates the features of the DS18B20.
The DS18B20 EV system comes with the 8-pin μSOP DS18B20U+ installed.
Applications
- Consumer Products
- Industrial Systems
- Thermally Sensitive Systems
- Thermometers
- Thermostatic Controls
DS18B20EVSYS1
Evaluation System for the DS18B20
Product Detail
The DS18B20 evaluation system (EV system) demonstrates the DS18B20 1-wire thermometer. The DS18B20 EV system consists of the DS18B20 evaluation kit (EV kit) and the USB2PMB2 adapter board. Windows XP® and Windows® 7/8/8.1/10 compatible software provides a user-friendly interface that demonstrates the features of the DS18B20.
The DS18B20 EV system comes with the 8-pin μSOP DS18B20U+ installed.
Applications
- Consumer Products
- Industrial Systems
- Thermally Sensitive Systems
- Thermometers
- Thermostatic Controls
Tools & Simulations 2
Software Development 1
IBIS Model 1
IBIS Model
