ACS770LCB-100B-PFF-T Enhanced Thermal, Fully Integrated, Hall-Effect-Based, High-Precision Linear Current Sensor IC with 100 μΩ Current Conductor The Allegro™ ACS770 Current Sensor IC
The series provides an affordable and accurate solution for AC or DC current sensing. Typical applications include motor control, load detection and management, power supply and DC-to-DC converter control, inverter control, and overcurrent fault detection.
The equipment consists of a low-offset precision linear Hall circuit with a copper current path close to the surface of the wafer. The current flowing through this current path creates a magnetic field centered on a low hysteresis core, which is converted by the Hall IC into a voltage output of equal proportion. By bringing the magnetic signal as close to the Hall sensor as possible, the device accuracy is optimized. The accurate, proportional output voltage is provided by a stabilized chopper-type low-bias BiCMOS Hall IC that is shipped with precision programming. The same proportional digital temperature compensation technology dramatically improves IC accuracy and temperature stability without compromising the high-bandwidth operation of the analog output.
Allegro's proprietary integrated shielding technology provides high tolerance to current conductor dV/dt signals and stray electric fields, ensuring low output voltage ripple and low bias drift in high-side, high-voltage applications.
The output of the device has a positive slope (>VCC/2 for bidirectional devices) as the current rises through the main copper conduction path (from terminal 4 to terminal 5) that is used as the current sensing path. The internal resistance of this current flow circuit is typically 100 μΩ, which has a low power loss.
The thickness of the copper wire allows the device to operate under high overcurrent conditions. The current path is galvanically isolated from the terminal end and the signal leads (pins 1 through 3). This allows the ACS770 sensor IC family to be used in applications where electrical isolation is required without the use of photoisolators or other expensive insulation technologies.
The device is fully calibrated prior to shipment. The ACS770 series is lead-free. All leads are plated with 100% matte tin, and there is no lead present in the package. The large size pin frame is made of oxygen-free copper.
-
凭借新的偏置和灵敏度分段线性数字温度补偿，实现行业领先的总输出准确性
-
通过专利放大器和滤波器设计工艺实现行业领先的噪音性能
-
120 kHz 典型带宽
-
4.1 μs 输出上升时间，对应步进输入电流
-
集成屏蔽可大幅减少因高 dV/dt 信号导致电流导体至晶片的电容耦合，并可防止高端、高电压应用中的偏置漂移。
-
通过在完整的操作温度范围内进行数字编程和补偿增益和偏置，大幅改善总输出错误
-
小型封装尺寸，安装简便
-
高可靠性的单片霍尔 IC
-
超低功率损耗：100 μΩ 内部传导电阻
-
绝缘设计可实现高电压系统中经济实惠的高端电流感测
-
4.5 至 5.5 V, 单电源工作
-
输出电压与交流或直流电流成比例
-
出厂时已经校准，确保精确度
-
极度稳定的输出偏移电压
-
VCC 低于规定时的欠压锁定
-
符合 AEC Q-100 汽车级标准
-
通过 UL 认证，文件编号 E316429
//www.chip100.com/