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Documents Allegro MicroSystems Introduces New 120 kHz Bandwidth, High-Voltage Isolation Current Sensor IC
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  • Author Author: ALex
  • Date Created: 26 Oct 2009 1:40 AM Date Created
  • Last Updated Last Updated: 7 Oct 2021 12:49 AM
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Allegro MicroSystems Introduces New 120 kHz Bandwidth, High-Voltage Isolation Current Sensor IC

Ideal Solution for your High Voltage Isolation Needs

Source from: www.allegromicro.com


Worcester, MA – October 22, 2009 — Allegro MicroSystems, Inc. announces a new 120 kHz bandwidth, high-voltage isolation current sensor IC that provides an economical and precise means for current sensing applications in industrial, commercial, and communications systems. The device is offered in a small footprint surface mount package that allows easy implementation in customer applications.image

 

Allegro’s ACS710 device consists of a precision linear Hall sensor integrated circuit with a copper conduction path located near the surface of the silicon die. Applied current flows through the copper conduction path, and the analog output voltage from the Hall sensor IC linearly tracks the magnetic field generated by the applied current. The accuracy of the ACS710 is maximized with this patented packaging configuration because the Hall element is situated in extremely close proximity to the current to be measured.

 

High level immunity to the current conductor dV/dt and stray electric fields, offered by Allegro’s proprietary integrated shield technology, guarantees low ripple at output and low offset drift in high-side, high-voltage applications. The voltage on the overcurrent input (VOC pin) allows customers to define an overcurrent fault threshold for the device. When the current flowing through the copper conduction path (between the IP+ and IP– pins) exceeds this threshold, the open drain overcurrent fault pin will transition to a logic low state. Factory programming of the linear Hall sensor IC inside of the ACS710 results in exceptional accuracy in both analog and digital output signals.

 

The internal resistance of the copper path used for current sensing is typically 1 mΩ, for low power loss. Also, the current conduction path is electrically isolated from the low voltage sensor inputs and outputs. This allows the ACS710 family of sensor ICs to be used in applications requiring electrical isolation, without the use of optoisolators or other costly isolation techniques.

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