Features and Benefits

• Monolithic Hall IC for high reliability
• Single +5 V supply
• 3 kVRMSisolation voltage between terminals 4/5 and pins 1/2/3
• 35 kHz bandwidth
• Automotive temperature range
• End-of-line factory-trimmed for gain and offset
• Ultra-low power loss: 100 µΩ internal conductor resistance
• Ratiometric output from supply voltage
• Extremely stable output offset voltage
• Small package size, with easy mounting capability
• Output proportional to ac and dc currents

Description

The Allegro ACS75x family of current sensors provides economical and precise solutions for current sensing in industrial, automotive, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, power supplies, and overcurrent fault protection.

The device consists of a precision, low-offset linear Hall sensor circuit with a copper conduction path located near 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 at the factory.

The output of the device has a positive slope (>VCC/ 2) when an increasing current flows through the primary copper conduction path (from terminal 4 to terminal 5), which is the path used for current sensing. The internal resistance of this conductive path is typically 100 µΩ, providing low power loss. The thickness of the copper conductor allows survival of the device at up to 5x overcurrent conditions. The terminals of the conductive path are electrically isolated from the sensor leads (pins 1 through 3). This allows the ACS75x family of sensors to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques.

The device is fully calibrated prior to shipment from the factory. The ACS75x family is lead-free. All leads are coated with 100% matte tin, and there is no lead inside the package. The heavy gauge leadframe is made of oxygen-free copper.

ACS754
电流传感器

功能及优点

• 高可靠性的单片霍尔 IC
• +5 V 单电源
• 端子 4/5 和引脚 1/2/3 之间的隔离电压高达 3 kVRMS
• 35 kHz 带宽
• 汽车温度范围
• 下线工厂校准增益和偏移
• 超低功率损耗： 100 µΩ 内部导体电阻
• 电源电压的成比例输出
• 极度稳定的输出偏移电压
• 小型封装尺寸，安装简便
• 输出与交流和直流电流成比例

描述

Allegro ACS75x 系列电流传感器可为工业、汽车、商业和通信系统领域提供经济实惠、测量精确的电流检测解决方案。 该器件采用封装设计，便于客户使用。 典型应用包括电动机控制、负载检测及管理、电源和过流保护。

该器件由一个低偏移的精密线性霍尔传感器电路组成，其铜制的电流路径靠近晶片的表面。 流过该电流路径的电流会产生一个磁场，该磁场可被集成霍尔IC检测并转换成同比例的电压输出。 通过将磁信号尽量接近霍尔传感器，器件的精确度已得到极大的优化。 一个精确的成比例的电压由低偏移、斩波稳定的 BiCMOS 霍尔 IC 提供，并且该 IC 出厂前已对精确度设定。

当递增式电流流过用作电流检测通路的主电流路径（从端子 4 到端子 5）时，器件的输出具有正斜率 (>VCC/ 2)。 该电流路径的内电阻通常为 100 µΩ，功率损耗较低。 铜线的厚度允许器件在高达 5倍的过电流条件下工作。 电流路径的接线端与传感器引脚（引脚 1 到 3）之间电气隔离。 凭借上述优点，ACS75x 系列传感器可取代光耦或其他成本高昂的隔离技术用于要求电气隔离的应用。

器件在出厂装运前已完全校准。 ACS75x 系列是无铅产品。 所有的引脚均镀以 100% 雾锡，封装内无铅存在。 大尺寸引脚框由无氧铜制成。

功能方框图