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MAX1989：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 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

关键参数

开发工具

• MAX1668EVSYS

质量和环境数据

• MAX1989.pdf

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

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