DS18B20可编程的单总线协议数字温度计
资料介绍:
DS18B20可编程的单总线协议数字温度计
1 概述
1.1 特性:
独特的单线接口,只需1个接口引脚即可通信
多点能力使分布式温度检测应用得以简化
不需要外部元件
可用数据线供电,工作电压范围:3.0V~5.5V
不需备份电源
测量范围从-55℃至+125℃增量值为0.5℃等效的华氏温度范围是-67°F至257 °F增量值为0.9 °F
以9位到12位的数值读出温度
选用12位测量精度时,最大的转换时间为750ms
用户可定义的,非易失性的温度告警设置
告警搜索命令识别和寻址温度在编定的极限之外的器件(温度告警情况)
应用范围包括恒温控制、工业系统、消费类产品、温度计或任何热敏系统
1 Introduction
1.1 FEATURES
Unique 1-Wire TM interface requires only one port pin for communication
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Multidrop capability simplifies distributed temperature sensing applications
Requires no external components
Can be powered from data line. Power supply range is 3.0V to 5.5V
Zero standby power required
Measures temperatures from -55°C to +125°C. Fahrenheit equivalent is -67°F to +257°F
Thermometer resolution is programmable from 9 to 12 bits
Converts 12-bit temperature to digital word in 750 ms (max.)
User-definable, nonvolatile temperature alarm settings
Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition)
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