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ACS70331:高灵敏度、1 MHz 基于 GMR 的电流传感器 IC，采用节省空间的低电阻 QFN 封装

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ACS70331 是 Allegro 首款集成高灵敏度电流传感器 IC，适用于 <5 A电流检测应用。它结合了比传统霍尔效应传感器灵敏 25 倍的巨磁阻 (GMR) 技术，以感应电流产生的磁场，该磁场通过低电阻、集成一次导体内电流产生。

模拟输出提供低噪声的高速信号，它与流经一次导体的电流成正比。该器件的响应时间通常为 535 ns。ACS70331 提供四种工厂编程灵敏度和偏置电平，可在所需电流测量范围内优化性能。

GMR 元件相对于集成电流导体的差分配置显著抑制了杂散磁场，即使在嘈杂的磁环境中也能够稳定工作。

ACS70331 采用 3.3 V 单电源供电，工作温度范围为 -40°C 至 85°C。它采用节省空间的扁平表面贴装 QFN 封装。

  • 高灵敏度电流传感器 IC，用于感测高达 5 A（直流或交流）
  • 1 MHz 带宽，响应时间 <550 ns
  • 低噪声：8 mA(rms)，1 MHz
  • 模拟输出与交直流电流成正比
  • 单 3.3 V 电源操作
  • 高直流 PSRR 可使用低精度电源或电池（3 至 4.5 V操作）
  • 1.1 mΩ 一次导体电阻导致功率损失低
  • 小表面封装QFN封装用于空间狭小应用
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ACS70331EESA Gerber Files
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ASEK70331 Gerber Files
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Mikroe Demoboards


PWR Meter 3 Demo Board

The Hall Current 4 click is designed to measure relatively high current by using the integrated ACS70331 sensor. The current sensor is based on the GMR elements for current measurement.


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