• Product introduction

ACS710KLATR-12CB-NL-TBandwidth 120 kHz, high voltage isolated current sensor IC with integrated overcurrent detection

The Allegro® ACS710 current sensor IC provides an affordable, accurate solution for current sensing applications in industrial, commercial, and communications systems. The device comes with a small size wall-mounted package for easy user use.

The ACS710 device has a precise linear Hall sensor IC with a copper current path close to the surface of the die. The impressed current flows through the copper current path, while the analog output voltage of the Hall sensor IC linearly tracks the magnetic field generated by the applied current. The accuracy of the ACS710 is maximized by this patented packaging device because the position of the Hall element is very close to the current that needs to be measured.

Allegro's unique integrated screen technology provides high immunity 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 overcurrent voltage input (VOC pin) allows the user to set an overcurrent fault standard for this device. When the current flowing through the copper current path (between IP+ and IP– pins) exceeds this standard, the open drain overcurrent fault pin transitions to a logic low state. The read-only program written to the ACS710's internal linear Hall sensor IC makes both analog and digital output signals exceptionally accurate.

A typical copper in-path resistor for current sensing is 1 mΩ with minimal power loss. Also, the current path is insulated from the input and output of the low-voltage sensor. This allows the ACS710 sensor family to be used in applications that require electrical insulation without the use of opto-insulators or other expensive insulation technologies.

apply

• Motor control and protection
• Load management and overcurrent detection
• Power conversion and battery monitoring /UPS system

• Patented amplifier and filter design processes enable high bandwidth, industry-leading noise performance
• Small size for applications with space constraints.
• The 1 mΩ primary conductor resistance results in low power loss
• The high insulation voltage is suitable for live wire applications in the grid
• User-adjustable overcurrent fault criteria
• Overcurrent fault signals are usually reflected
• Due to the high transient voltage of dV/dt, the integrated screen virtually completely eliminates capacitive coupling in the current conductor.
• Filter pin capacitors improve resolution in low bandwidth applications.
• 3 to 5.5 V, single-supply operation
• Factory-set sensitivity and quiescent output voltage
• Stable chopping results in a very stable quiescent output voltage
• Proportional output of the supply voltage