DS18B20-PAR

1-Wire寄生供电数字温度计


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说明

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.

关键特性

  • 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

应用

  • 远端检测应用
Part NumberSensor TypeInterfaceChannelsAccuracy
(±°C)
Parasite Pwr.Temp. Thresh.Temp. Resolution
(bits)
Multi DroppableOper. Temp.
(°C)
Package/PinsBudgetary
Price
See Notes
DS18B20-PAR Local1-WireOne0.5YesProgrammable (NV)
9
10
11
12
Yes-55 to +100
TO92/3
$2.40 @1k
查看所有Temperature Sensors (112)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

技术资料

参考原理图 5508 Create a 1-Wire Master with Xilinx PicoBlaze
应用笔记 5507 Understanding the DS1WM Synthesizable 1-Wire Bus Master
设计指南 4700 Introduction to Medical Instruments and Growing Trend for Point-of-Care and Near-Patient Testing
设计指南 4699 传感器信号通道
设计指南 4679 热管理设计手册
应用笔记 4600 简单软件实现1-Wire®温度器件的硬件CRC校验和串行码流的误码检测
参考原理图 4477 1-Wire®双向电平转换器(1.8V至5V)参考设计
应用笔记 4377 Comparison of the DS18B20 and DS18S20 1-Wire® Digital Thermometers
应用笔记 4277 采用MAXQ2000 USB “拇指”评估套件进行设计
设计指南 4255 为1-Wire®器件的扩展功能供电
应用笔记 3930 Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
应用笔记 3754 Single-Wire Serial Bus Carries Isolated Power and Data
应用笔记 2965 1-Wire Master Device Configuration
应用笔记 2420 与Microchip PICmicro微控制器之间的1-Wire®通信
应用笔记 1100 White Paper 5: Using 1-Wire APIs for Data Sheet Commands
参考原理图 244 性能优异的1-Wire网络驱动器
应用笔记 208 Curve Fitting the Error of a Bandgap-Based Digital Temperature Sensor
应用笔记 203 DS18B20-PAR/DS18S20-PAR/DS1822-PAR Advantages for Remote Temperature Sensing
应用笔记 192 DS2480B串行接口1-Wire®线驱动器的使用
应用笔记 187 1-Wire搜索算法
应用笔记 162 Interfacing the DS18X20/DS1822 1-Wire® Temperature Sensor in a Microcontroller Environment
应用笔记 158 用XML实现1-Wire®标签
设计指南 148 长线1-Wire网络可靠设计指南
应用笔记 126 用软件实现1-Wire®通信
应用笔记 27 理解和运用Maxim iButton产品中的循环冗余校验(CRC)

质量和环境数据

申请可靠性报告: DS18B20-PAR 
无铅封装的锡(Sn)晶须报告

其它资源

温度系列产品,按产品类型划分

CAD Symbols and Footprints

  • DS18B20+PAR
  • DS18B20-PAR+T&R
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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    类型 编号 PDF 标题
    参考原理图 5508 Create a 1-Wire Master with Xilinx PicoBlaze
    应用笔记 5507 Understanding the DS1WM Synthesizable 1-Wire Bus Master
    设计指南 4700 Introduction to Medical Instruments and Growing Trend for Point-of-Care and Near-Patient Testing
    设计指南 4699 传感器信号通道
    设计指南 4679 热管理设计手册
    应用笔记 4600 简单软件实现1-Wire®温度器件的硬件CRC校验和串行码流的误码检测
    参考原理图 4477 1-Wire®双向电平转换器(1.8V至5V)参考设计
    应用笔记 4377 Comparison of the DS18B20 and DS18S20 1-Wire® Digital Thermometers
    应用笔记 4277 采用MAXQ2000 USB “拇指”评估套件进行设计
    设计指南 4255 为1-Wire®器件的扩展功能供电
    应用笔记 3930 Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices
    应用笔记 3754 Single-Wire Serial Bus Carries Isolated Power and Data
    应用笔记 2965 1-Wire Master Device Configuration
    应用笔记 2420 与Microchip PICmicro微控制器之间的1-Wire®通信
    应用笔记 1100 White Paper 5: Using 1-Wire APIs for Data Sheet Commands
    参考原理图 244 性能优异的1-Wire网络驱动器
    应用笔记 208 Curve Fitting the Error of a Bandgap-Based Digital Temperature Sensor
    应用笔记 203 DS18B20-PAR/DS18S20-PAR/DS1822-PAR Advantages for Remote Temperature Sensing
    应用笔记 192 DS2480B串行接口1-Wire®线驱动器的使用
    应用笔记 187 1-Wire搜索算法
    应用笔记 162 Interfacing the DS18X20/DS1822 1-Wire® Temperature Sensor in a Microcontroller Environment
    应用笔记 158 用XML实现1-Wire®标签
    设计指南 148 长线1-Wire网络可靠设计指南
    应用笔记 126 用软件实现1-Wire®通信
    应用笔记 27 理解和运用Maxim iButton产品中的循环冗余校验(CRC)