The Allegro® ACS714 provides an affordable, sophisticated solution for AC or DC current sensing in automotive systems. The device is packaged for easy implementation. Typical applications include motor control, load detection and management, switching power supplies, and overcurrent fault protection.
The device features an accurate low-bias linear Hall sensor circuitry with a copper current path close to the surface of the wafer. The current applied through this copper current path generates a magnetic field that can be sensed by the integrated Hall IC and converted into a proportional voltage. By bringing the magnetic signal closer to the Hall sensor, the device accuracy is optimized. The precise proportional voltage is provided by a stable chopper-type low-bias BiCMOS Hall IC that is programmed for post-package accuracy.
The output of the device has a positive slope (>VIOUT(Q)) as the current rises through the main copper current path used as the current sensing path, from pins 1 and 2 to pins 3 and 4. The internal resistance of this conduction path is typically 1.2 mΩ, which has a low power consumption. The size of the copper wire allows the device to operate under overcurrent conditions of up to 5×. The terminal end of the conduction path is electrically insulated from the sensor pins (pins 5 through 8). This allows the ACS714 current sensor IC to be used in applications where electrical isolation is required without the use of photoisolators or other expensive insulation technologies.
The ACS714 is available in a small, surface-mount SOIC8 package. The pin holders are 100% matte tin plated and are compatible with standard lead-free printed circuit board assembly processes. Internally, the device is lead-free, except for the current RoHS-exempt high-temperature leaded solder balls used by the flip method. The device is fully calibrated prior to shipment.
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低噪音模拟信号路径
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可通过滤波引脚设置器件带宽
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5 µs 输出上升时间，对应步进输入电流
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80 千赫带宽
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一般总输出误差为 1.5%（当 TA = 25°C）
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小型低厚度 SOIC8 封装
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1.2 mΩ 内部传导电阻
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引脚 1-4 至 5-8 之间 2.1 VRMS 最小绝缘电压
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5.0 伏特，单电源操作
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66 至 185 mV/A 输出灵敏度
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输出电压与交流或直流电流成比例
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出厂时精确度校准
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极稳定的输出偏置电压
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近零的磁滞
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电源电压的成比例输出
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工作温度范围为 -40°C 至 150°C。
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