The Allegro™ ACS723 current sensor IC is an affordable, accurate solution for AC or DC current sensing in industrial, commercial, and communications systems. The small package is ideal for applications where space is at a premium, while the smaller board area also saves costs. Typical applications include motor control, load detection and management, switching power supplies, and overcurrent fault protection.
该器件由一个低偏置的精密线性霍尔传感器电路组成，其铜制电流通路靠近晶片的表面。通过该铜制电流通路施加的电流能够生成可被集成霍尔 IC 感应并转化为成比例电压的磁场。通过将磁场靠近霍尔传感器，实现器件精度优化。精确的成比例电压由稳定斩波型低偏置 BiCMOS 霍尔 IC 提供，其包括 Allegro’获得专利的数字温度补偿，带来极为精确的温度性能。当越来越多的电流流经铜制主电流通路（从引脚 1 和 2，到引脚 3 和 4）时，器件的输出为正斜率。前述路径是电流传感使用的路径。本传导路径的内电阻通常是 0.65 mΩ，功耗低。
The terminals of the current path are electrically isolated from the sensor pins (pins 5 through 8). This allows the ACS723 current sensor IC to be used in high-side current sensing applications that do not use high-side differential amplifiers or other cost-effective insulation techniques.
The ACS723 is available in a small, low-profile surface-mount SOIC8 package. The leadframe is 100% matte tin plating for compatibility with standard lead-free printed circuit board assembly processes. The device is internally lead-free, with the exception of flip-chip high-temperature leaded solder balls that currently enjoy RoHS exemptions. The device is fully calibrated before shipping from the factory.
- The patented integrated digital temperature compensation circuit takes into account the accuracy of near-closed-loop temperature measurements within open-loop sensors
- UL60950-1 (ed. 2) certified
- Dielectric strength voltage = 2.4 kVrms
- Basic insulation operating voltage = 420 Vpk/297 VRMS
- Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and filter design processes
- Pin selectable bandwidth: 80 kHz for high bandwidth applications or 20 kHz for low noise performance.
- Main conductor resistance with 0.65 mΩ low power consumption and high inrush current tolerance
- The small, slim SOIC8 package is ideal for space-constrained applications
- The integrated screen virtually eliminates capacitive coupling from the current conductor to the wafer, greatly suppressing output noise caused by high dv/dt transients
- 4.5 to 5.5 V with single supply operation
- The output voltage is commensurate with the AC or DC current
- Factory-calibrated sensitivity and quiescent output voltage are used to improve accuracy
- The stable chopper results in an extremely stable quiescent output voltage
- Near-zero hysteresis
- Ratiometric output of the supply voltage