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DS18B20-PAR

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1-Wire Parasite-Power Digital Thermometer

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Product Details

See parametric specs for Temperature Sensors

Key Features

Applications/Uses

See parametric specs for Temperature Sensors

Simplified Block Diagram

Technical Docs

Data Sheet 1-Wire Parasite-Power Digital Thermometer Nov 19, 2003
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
App Note 1-Wire Communication Through Software
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
App Note 1-Wire® Tagging with XML
App Note Interfacing the DS18X20/DS1822 1-Wire® Temperature Sensor in a Microcontroller Environment
App Note 1-Wire Search Algorithm
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note DS18B20-PAR/DS18S20-PAR/DS1822-PAR Advantages for Remote Temperature Sensing
App Note Curve Fitting the Error of a Bandgap-Based Digital Temperature Sensor
Reference Schematic Advanced 1-Wire Network Driver
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note 1-Wire Master Device Configuration
App Note Single-Wire Serial Bus Carries Isolated Power and Data
App Note Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note Getting Started with the MAXQ2000 USB Thumb Evaluation Kit
App Note Comparison of the DS18B20 and DS18S20 1-Wire® Digital Thermometers
Reference Schematic Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note Simple Software Validates the Hardware CRC and Detects Errors in the Serial Bit Stream of 1-Wire® Thermal Devices
Tutorial Thermal Management Handbook
Tutorial Overview of Sensor Signal Paths
Tutorial Introduction to Medical Instruments and Growing Trend for Point-of-Care and Near-Patient Testing
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
Reference Schematic Create a 1-Wire Master with Xilinx PicoBlaze

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Key Features

  • Unique 1-Wire Interface Requires Only One Port Pin for Communication
  • Derives Power from Data Line ("Parasite Power")—Does Not Need a Local Power Supply
  • Multi-Drop Capability Simplifies Distributed Temperature Sensing Applications
  • Requires no External Components
  • ±0.5°C Accuracy from -10°C to +85°C
  • Measures Temperatures from -55°C to +100°C (-67°F to +212°F)
  • Thermometer Resolution is User-Selectable from 9 to 12 Bits
  • Converts Temperature to 12-Bit Digital Word in 750ms (max.)
  • User-Definable Non-Volatile Temperature Alarm Settings
  • Alarm Search Command Identifies and Addresses Devices Whose Temperature is Outside of Programmed Limits (Temperature Alarm Condition)
  • Software compatible with the DS1822-PAR
  • Ideal for Use in Remote Sensing Applications (e.g., Temperature Probes) That do not Have a Local Power Source

Applications/Uses

  • Remote Sensing Applications

Description

The DS18B20-PAR digital thermometer provides 9 to 12-bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18B20-PAR does not need an external power supply because it derives power directly from the data line ("parasite power"). The DS18B20-PAR communicates over a 1-Wire® bus, which by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of -55°C to +100°C and is accurate to ±0.5°C over a range of -10°C to +85°C.

Each DS18B20-PAR has a unique 64-bit identification code, which allows multiple DS18B20-PARs to function on the same 1-wire bus; thus, it is simple to use one microprocessor to control many DS18B20-PARs 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.

Simplified Block Diagram

 

Technical Docs

Data Sheet 1-Wire Parasite-Power Digital Thermometer Nov 19, 2003
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
App Note 1-Wire Communication Through Software
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
App Note 1-Wire® Tagging with XML
App Note Interfacing the DS18X20/DS1822 1-Wire® Temperature Sensor in a Microcontroller Environment
App Note 1-Wire Search Algorithm
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note DS18B20-PAR/DS18S20-PAR/DS1822-PAR Advantages for Remote Temperature Sensing
App Note Curve Fitting the Error of a Bandgap-Based Digital Temperature Sensor
Reference Schematic Advanced 1-Wire Network Driver
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note 1-Wire Communication with a Microchip PICmicro Microcontroller
App Note 1-Wire Master Device Configuration
App Note Single-Wire Serial Bus Carries Isolated Power and Data
App Note Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
App Note Getting Started with the MAXQ2000 USB Thumb Evaluation Kit
App Note Comparison of the DS18B20 and DS18S20 1-Wire® Digital Thermometers
Reference Schematic Reference Design of a 1-Wire® Bidirectional Voltage-Level Translator for 1.8V to 5V
App Note Simple Software Validates the Hardware CRC and Detects Errors in the Serial Bit Stream of 1-Wire® Thermal Devices
Tutorial Thermal Management Handbook
Tutorial Overview of Sensor Signal Paths
Tutorial Introduction to Medical Instruments and Growing Trend for Point-of-Care and Near-Patient Testing
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
Reference Schematic Create a 1-Wire Master with Xilinx PicoBlaze

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .