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说明

EMC1704是一种高侧电流传感装置，具有精确的温度测量功能。它测量外部感测电阻器两端产生的电压，以表示电池或电压调节器的高侧电流。它还测量总线电压，并使用这些测量值来进行比例功率计算。EMC1704包含额外的双向峰值检测电路，用于标记具有可编程持续时间和幅度阈值的瞬时电流尖峰。最后，EMC1704包括最多三（3）个外部二极管通道和一个用于温度测量的内部温度传感器。

温度测量包括高级功能，如电阻误差校正（REC）、贝塔补偿（支持需要BJT/晶体管型号的CPU二极管，包括45nm和65nm处理器）和自动二极管类型检测。

电流传感和温度监测都包括两层保护：一层可以屏蔽并导致ALERT#引脚被断言，另一层不能屏蔽并导致THERM#引脚被断定。

特性

• Bi-directional current measurement
• Measures bus voltage
• 1% current measurement accuracy
• Integrated over 82ms to 2.6sec with 11-bit resolution
• 3V to 24V voltage bus voltage range
• Calculates proportional power
• Software controls to program time duration and magnitude threshold
• Bus or separately powered for low voltage operation
• Wide temperature operating range: -40°C to +85°C
• 1°C accuracy (20°C < TDIODE < 110°C) with 0.125°C resolution
• Ideality factor setting
• Support for 45nm and 65nm CPU diodes requiring the BJT/transistor model with beta compensation
• Determines external diode type and optimal settings
• Resistance Error Correction
• Anti-parallel diode support for additional diode options
• ±1°C accuracy (-5°C < TA < 85°C)
• ALERT# and THERM# outputs for temperature, voltage, and out-of-current limit reporting
• Pin-selectable SMBus Address
• Block Read and Write
• General Purpose I/O
• Available in a RoHS Compliant Package: 14-pin SOIC (EMC1704-1) or 16-pin 4mm x 4mm QFN (EMC1704-2)
• Notebook and Desktop Computers
• Industrial
• Power Management Systems
• Embedded Applications

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