DS1820 单线数字温度计

中文字数:6598,中文页数:13  英文字数:4822  页数:17

 DS1820 1–WireTM Digital Thermometer
FEATURES
Unique 1–WireTM interface requires only one port pin for communication
Multidrop capability simplifies distributed temperature sensing applications
Requires no external components
Can be powered from data line
Zero standby power required
 Measures temperatures from –55C to +125C in0.5C increments.Fahrenheit equivalent is –67F to+257F in 0.9F increments
Temperature is read as a 9–bit digital value.
Converts temperature to digital word in 200 ms (typ.)
User–definable, nonvolatile temperature alarm settings
 Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition)
 Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system

DS1820 单线数字温度计
特性
• 独特的单线接口仅需一个端口引脚进行通讯
• 简单的多点分布应用
• 无需外部器件
• 可通过数据线供电
• 零待机功耗
• 测温范围-55~+125℃，以0.5℃递增。华氏器件-67~+2570F，以0.90F 递增
• 温度以9 位数字量读出
• 温度数字量转换时间200ms（典型值）
• 用户可定义的非易失性温度报警设置
• 报警搜索命令识别并标志超过程序限定温度（温度报警条件）的器件
• 应用包括温度控制、工业系统、消费品、温度计或任何热感测系统