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说明
EMC1702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。EMC1702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，EMC1702包括用于温度测量的外部二极管通道以及用于环境温度测量的内部二极管。
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
- ±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
- Available in a 12-pin 4mm x 4mm QFN RoHS Compliant Package
- Notebook and Desktop Computers
- Industrial
- Power Management Systems
- Embedded Applications
参数
类型 | 描述 |
Description | Current/DC Power Sensor with Temperature Monitoring |
Vsense min FSR (mV) | -10, -20, -40, -80 |
Vsense max FSR (mV) | 10, 20, 40, 80 |
Vsense accuracy (% FSR, max) | 0.9 |
Vbus Range min (V) | 3 |
Vbus Range max (V) | 24 |
Vbus accuracy (% FSR, max) | 0.05 |
Sampling Interval min (msec) | 2.5 |
Sampling Interval max (msec) | 2600 |
Remote Temperature Monitors | 0 |
# Ambient Temperature Monitors | 1 |
Temperature Accuracy Typical (°) | 0.25 |
Temperature Accuracy Max (°) | 1 |
Alert/Therm | 2 |
Peak Detection | Hardware |
Accumulator? | No |
Interface | SMBus/I2C |
Address Select | 15 |
# Current Channel | 1 |
ADC Resolution (bit) | 11 |
