ACS712：完全集成的，基于霍尔效应的线性电流传感器IC，具有2.1 KVRMS电压隔离和低电阻电流导体

The Allegro ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection. The device is not intended for automotive applications. For the automotive grade version, seeACS714。

The device consists of a precise, low-offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic signal to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging.

设备的输出具有正斜率（> V._iout（q）) when an increasing current flows through the primary copper conduction path (from pins 1 and 2, to pins 3 and 4), which is the path used for current sensing. The internal resistance of this conductive path is 1.2 mΩ typical, providing low power loss. The thickness of the copper conductor allows survival of the device at up to 5× overcurrent conditions. The terminals of the conductive path are electrically isolated from the sensor IC leads (pins 5 through 8). This allows the ACS712 current sensor IC to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques.

The ACS712 is provided in a small, surface mount SOIC8 package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory.

• 低噪声模拟信号路径
• 通过新的过滤器引脚设置设备带宽
• 5μs输出上升时间响应于步进输入电流
• 80 kHz带宽
• Total output error 1.5% at T_一种= 25°C
• 小脚印，低调SOIC8包装
• 1.2MΩ内部导体电阻
• 2.1 kv._rms.minimum isolation voltage from pins 1-4 to pins 5-8
• 5.0 V, single supply operation
• 66至185 mV /输出灵敏度
• 输出电压与AC或直流电流成比例
• 用于准确性的工厂
• Extremely stable output offset voltage
• 几乎零磁滞
• Ratiometric output from supply voltage