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1-Wire Parasite-Power, Ambient Temperature Sensor

Parasite-Powered Digital Temperature Sensor in TO-92 Package Minimizes Wiring and is Ideal for Measuring Ambient Temperature

产品详情

主要特征

应用/用途

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 1-Wire
Accuracy (±°C) 0.5
Parasite Pwr. Yes
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +100
Package/Pins TO92/3
Budgetary
Price (See Notes)
1.18
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简化框图

技术文档

数据资料 1-Wire Parasite-Power, Ambient Temperature Sensor Jun 28, 2013
应用笔记 理解和运用Maxim iButton产品中的循环冗余校验(CRC)
应用笔记 用软件实现1-Wire®通信
设计指南 长线1-Wire网络可靠设计指南
应用笔记 用XML实现1-Wire®标签
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 1-Wire搜索算法
应用笔记 DS2480B串行接口1-Wire®线驱动器的使用
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
参考原理图 性能优异的1-Wire网络驱动器
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 与Microchip PICmicro微控制器之间的1-Wire®通信
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 采用MAXQ2000 USB “拇指”评估套件进行设计
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
参考原理图 1-Wire®双向电平转换器(1.8V至5V)参考设计
应用笔记 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
设计指南 热管理设计手册
设计指南 传感器信号通道
设计指南 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
参考原理图 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products

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参量

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 1-Wire
Accuracy (±°C) 0.5
Parasite Pwr. Yes
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +100
Package/Pins TO92/3
Budgetary
Price (See Notes)
1.18

主要特征

  • Unique 1-Wire Interface Requires Only One Port Pin for Communication
  • Derives Power from Data Line (Parasite Power); No Local Power Supply Needed
  • Multidrop Capability Simplifies Distributed Temperature-Sensing Applications
  • Requires No External Components
  • Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
  • ±0.5°C Accuracy from +10°C to +45°C
  • Thermometer Resolution is User-Selectable from 9 Bits to 12 Bits
  • Converts Temperature to 12-Bit Digital Word in 750ms (Max)
  • User-Definable Nonvolatile (NV) Alarm Settings
  • Alarm Search Command Identifies and Addresses Devices Whose Temperature is Outside Programmed Limits (Temperature Alarm Condition)
  • Available in 3-Pin TO-92 Package
  • Software Compatible with the DS1822-PAR and DS18B20-PAR

应用/用途

  • 任何对温度敏感的系统
  • 消费类产品
  • HVAC环境控制
  • 工业系统
  • 过程监测和控制系统
  • 建筑、设备或机房内部温度监测系统
  • 温度计
  • 温度监控器控制

描述

The MAX31820PAR ambient temperature sensor provides 9-bit to 12-bit Celsius temperature measurements with ±0.5°C accuracy over a +10°C to +45°C temperature range. Over its entire -55°C to +125°C operating range, the device has ±2.0°C accuracy.

The device 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 device derives power directly from the data line (“parasite power”), eliminating the need for an external power supply. Requiring so few pins enables the device to be placed in a 3-pin TO-92 package. The form factor of this package allows the device to be placed above the board and thus measure the ambient temperature of a system, as opposed to the board temperature that a surface-mount package would measure.

Each MAX31820PAR has a unique 64-bit serial code, which allows multiple MAX31820PAR devices to function on the same 1-Wire bus. Therefore, it is simple to use one microprocessor to control many devices distributed over a large area.

简化框图

MAX31820PAR: Block Diagram MAX31820PAR: Block Diagram Zoom icon

技术文档

数据资料 1-Wire Parasite-Power, Ambient Temperature Sensor Jun 28, 2013
应用笔记 理解和运用Maxim iButton产品中的循环冗余校验(CRC)
应用笔记 用软件实现1-Wire®通信
设计指南 长线1-Wire网络可靠设计指南
应用笔记 用XML实现1-Wire®标签
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 1-Wire搜索算法
应用笔记 DS2480B串行接口1-Wire®线驱动器的使用
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
参考原理图 性能优异的1-Wire网络驱动器
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 与Microchip PICmicro微控制器之间的1-Wire®通信
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 采用MAXQ2000 USB “拇指”评估套件进行设计
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
参考原理图 1-Wire®双向电平转换器(1.8V至5V)参考设计
应用笔记 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
设计指南 热管理设计手册
设计指南 传感器信号通道
设计指南 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
应用笔记 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
参考原理图 Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products

支持和培训

在Maxim的知识库中搜索您所需的答案。

过滤搜索

Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心