MAX1805:多通道远端/本地温度传感器

The MAX1668/MAX1805/MAX1989 are precise multichannel digital thermometers that report the temperature of all remote sensors and their own packages. The remote sensors are diode-connected transistors—typically low-cost, easily mounted 2N3904 NPN types—that replace conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The remote channels can also measure the die temperature of other ICs, such as microprocessors, that contain an on-chip, diode-connected transistor. The 2-wire serial interface accepts standard system management bus (SMBus™) write byte, read byte, send byte, and receive byte commands to program the alarm thresholds and to read temperature data. The data format is 7 bits plus sign, with each bit corresponding to 1°C, in two's-complement format. The MAX1668/MAX1805/MAX1989 are available in small, 16-pin QSOP surface-mount packages. The MAX1989 is also available in a 16-pin TSSOP.

关键特性
  • Multichannel
    • 4 Remote, 1 Local (MAX1668/MAX1989)
    • 2 Remote, 1 Local (MAX1805)
  • No Calibration Required
  • SMBus 2-Wire Serial Interface
  • Programmable Under/Overtemperature Alarms
  • Supports SMBus Alert Response
  • Accuracy
    • ±2°C (+60°C to +100°C, Local)
    • ±3°C (-40°C to +125°C, Local)
    • ±3°C (+60°C to +100°C, Remote)
  • 3µA (typ) Standby Supply Current
  • 700µA (max) Supply Current
  • Small, 16-Pin QSOP/TSSOP Packages
MAX1668、MAX1805、MAX1989:典型工作电路
MAX1668、MAX1805、MAX1989:典型工作电路
应用
  • 局端电信设备
  • 台式计算机/笔记本电脑
  • 工业控制
  • LAN服务器
  • 多芯片模块
  • 测试与测量设备
数据手册DataSheet
语言下载文件备注
英文MAX1668-MAX1989.pdfRev 2; 06/2003
关键参数
Part NumberSensor TypeAlarm OutputFunctionsInterfaceChannelsAccuracy
(±°C)
Parasite Pwr.Temp. Resolution
(bits)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
See Notes
MAX1668RemoteAlertRemote & Local Sensor2-Wire/I2C/SMBusFour2No8-55 to +125QSOP/16$4.04 @1k
MAX1805TwoQSOP/16$3.35 @1k
MAX1989Four
  • QSOP/16
  • TSSOP/16
$3.82 @1k
开发工具
质量和环境数据
相关产品
  • MAX1668:多通道远端/本地温度传感器
  • MAX1805:多通道远端/本地温度传感器
  • MAX1669:风扇控制器及远端温度传感器,带有SMBus串行接口
  • MAX1617:远端/本地温度传感器,带有SMBus串行接口
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX1805MEE停止供货MAX1805MEE+QSOP,;16引脚;30.9mm²-40°C至+85°CRoHS/无铅:否
MAX1805MEE+生产中QSOP,;16引脚;30.9mm²-55°C至+125°CRoHS/无铅:无铅
MAX1805MEE+T生产中QSOP,;16引脚;30.9mm²-40°C至+85°CRoHS/无铅:无铅
MAX1805MEE-T停止供货MAX1805MEE+TQSOP;16引脚-40°C至+85°C参考数据资料
MAX1668-MAX1989.pdf MAX1989
MAX1805.pdf MAX1805
MAX1668-MAX1989.pdf MAX1989