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Allegro MicroSystems, Inc. Launches Improved Accuracy
and Bandwidth Addition to Current Sensor Family
Simplify Manufacturing with a Small, Low-Cost, Isolated and
Lead-Free Current Sensor 
Worcester, MA — April 14, 2004 — Allegro Microsystems, Inc. announces the new ACS752 family of current sensor ICs, a higher-bandwidth (50 kHz) and improved accuracy companion to its existing ACS750 family of current sensor ICs. The devices provide 3 kV isolation and single +5 V supply operation while placing only 130 µW of resistance in the current path. 50 A and 100 A versions are available, rated for -20°C to 85°C operating temperature range. The lead-free, PC-mountable package is only 14x22x7 mm overall, and integrates the current path — no need to design your own magnetic circuit or thread your conductor through the device.
The bidirectional ACS752 sensor ICs consist of a precision linear Hall IC optimized to an internal magnetic circuit to increase device sensitivity. The combination of a precisely controlled self-aligning assembly process (patents pending) and the factory programmed precision of the linear Hall sensor IC results in improved accuracy, very low thermal drift and high product uniformity.
The innovative electro-mechanical package provides a fully integrated current sensing solution. The package consists of a two-pin power lead frame that passes current through a ferrite core and past the sensing element of a three-lead Hall IC. It requires minimal effort to implement on a PC board in a high-volume production environment by means of soldering or welding.
This new current sensor IC is targeted to meet the needs of the industrial, consumer and telecommunications markets with end applications to include AC motor control, battery management, UPS and emergency lighting, welding equipment, power distribution, white goods, fitness equipment, and electric vehicles.
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.
Editorial Contact:
Stephanie Fennelly
Director - Marketing Communications
Tel: (508) 854-5363
sfennelly@allegromicro.com