Hall-Effect Linear Current Sensor includes overcurrent fault output.

Press Release Summary:

Hall-effect linear current sensor IC withstands up to 5x overcurrent and supports AC or DC current sensing in low-voltage audio, communications systems, white goods, and automotive applications. Product accuracy is optimized through close proximity of magnetic signal to Hall transducer, and internal resistance of conductive path is 1.2 mW, providing non-intrusive measurement interface. Contained in SMT SOIC8 package, unit is compatible with Pb-free PCB assembly processes.

Original Press Release:

Allegro MicroSystems, Inc. Announces a New Hall-Effect Linear Current Sensor IC

Includes Overcurrent Fault Output for Low Voltage Isolation Applications

Worcester, MA - Allegro MicroSytems, Inc. introduces a new Hall-effect linear current sensor IC that provides economical and precise solutions for AC or DC current sensing in low-voltage audio, communications systems, white goods, and automotive applications. Typical applications include circuit protection, current monitoring, and motor and inverter control.

Allegro's device consists of a linear Hall sensor circuit with a copper conduction path located near the surface of 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. The output of the device has a positive slope proportional to the current flow from IP+ to IP- (pins 1 and 2, to pins 3 and 4). The internal resistance of this conductive path is 1.2 mW typical, providing a non-intrusive measurement interface that saves power in applications that require energy efficiency.

The ACS711 is optimized for low-side current sensing applications, although the terminals of the conductive path are electrically isolated from the sensor leads (pins 5 through 8), providing sufficient internal creepage and clearance dimensions for a low AC or DC working voltage applications. The thickness of the copper conductor allows survival of the device at up to 5x overcurrent conditions.

The ACS711 is provided in a small, surface mount SOIC8 package. The leadframe is plated with 100% matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory.

Please find the pricing below for 1,000 pieces:

ACS711ELCTR-12AB-T: $0.97

ACS711ELCTR-25AB-T: $0.97

ACS711KLCTR-12AB-T: $1.03

ACS711KLCTR-25AB-T: $1.03

About Allegro

Allegro MicroSystems, Inc. is a leader in developing, manufacturing and marketing high-performance power and Hall-effect sensor integrated circuits. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worcester, Massachusetts (USA) with design and applications centers located in North and South America, Asia, and Europe. Further information about Allegro can be found at www.allegromicro.com.

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