DS18B20
PRODUCTIONProgrammable Resolution 1-Wire Digital Thermometer
High-Precision Temperature Monitoring with Minimal Connections Ideal for Multisensor Systems
- Part Models
- 9
- 1ku List Price
- Starting From $3.06
Part Details
- 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
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
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Design Note 6
Technical Articles 18
Analog Dialogue 1
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 |
|---|---|---|---|
| DS18B20+ | TO92 | ||
| DS18B20+PAR | TO92 | ||
| DS18B20+T&R | TO92 | ||
| DS18B20-SL+T&R | TO92 | ||
| DS18B20/GG8 | TO92 | ||
| DS18B20U+ | Micro-MAX, Thin Shrink Small-Outline | ||
| DS18B20U+T&R | Micro-MAX, Thin Shrink Small-Outline | ||
| DS18B20Z+ | Small-Outline IC, Narrow (0.15in) | ||
| DS18B20Z+T&R | Small-Outline IC, Narrow (0.15in) |
| 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 | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| 1-Wire Temperature Sensors 2 | ||
| DS18B20-PAR | PRODUCTION | 1-Wire Parasite-Power Digital Thermometer |
| DS1822 | PRODUCTION | Econo 1-Wire Digital Thermometer |
Tools & Simulations
Software Development 1
IBIS Model 1
Evaluation Kits
Evaluation System for the DS18B20
Evaluation System for the DS18B20