ACS781xLR: High-Precision Linear Hall-Effect-Based Current Sensor IC With 200 μΩ Current Conductor

The Allegro ACS781xLR is a fully integrated current sensor linear IC in a new core-less package designed to sense AC and DC currents up to 100 A. This automotive-grade, low-profile (1.5 mm thick) sensor IC package has a very small footprint.

霍尔传感器技术还包括共模场抑制，以在存在由附近电流承载导体产生的干扰磁场的情况下优化性能。

该装置由精度，低偏移线性霍尔电路组成，具有位于模具附近的铜传导路径。流过该铜传导路径的施加电流产生霍尔IC转换成比例电压的磁场。通过在Allegro工厂的霍尔换能器到霍尔传感器和静态输出电压的霍尔传感器附近，通过初级导体附近优化了设备精度。

斩波稳定的信号路径和数字温度补偿技术也有助于设备跨工作温度范围的稳定性。

High-level immunity to current conductor dV/dt and stray electric fields, offered by Allegro proprietary integrated shield technology for low-output voltage ripple and low-offset drift in high-side, high-voltage applications.

The output of the device has a positive slope (>VCC / 2) when an increasing current flows through the primary copper conductionpath (from terminal 5 to terminal 6), which is the path used for current sampling. The internal resistance of this conductive path is 200 μΩ typical, providing low power loss.

铜导体的厚度允许在高过电条件下存活装置。导电路径的端子与信号引线（销1到4和7）电隔离，并且允许器件安全地在主导体上具有高达100V峰的电压。

该设备在从工厂发货之前完全校准。ACS781XLR家族是领先的（PB）。所有引线均配有100％哑光锡，包装内部没有PB。重型测量引线框架由无氧铜制成。

• Core-less, micro-sized, 100 A continuous current package
• Ultra-low power loss: 200 μΩ internal conductor resistance
• Immunity to common-mode field interference
• 通过数字编程和补偿增益和偏移在完全工作温度范围内极大地改善了总输出误差
• 通过专有放大器和滤波器设计技术的行业领先的噪声性能
• Integrated shield greatly reduces capacitive coupling from current conductor to die due to high dV/dt signals, and prevents offset drift in high-side, high-voltage applications
• Monolithic Hall IC for high reliability
• 3 to 3.6 V, single supply operation
• 120 kHz typical bandwidth
• 3.6 μs output rise time in response to step input current
• Output voltage proportional to AC or DC currents
• Factory-trimmed for accuracy
• Extremely stable quiescent output voltage
• AEC-Q100 automotive qualification