Allegro MicroSystems, Inc. Launches First SOIC8-Packaged Hall-Effect Current Sensor with Integrated Current Path

Worcester, MA, Jan. 7, 2005 — The newest current sensor IC family from Allegro MicroSystems, Inc., the ACS704, is the first SOIC8-packaged Hall-effect current sensor IC with the current path integrated into the package for greater sensitivity and accuracy. Available in both 15 A and 5 A versions, it measures bi-directional ac or dc currents by using a Hall-effect magnetic field sensor to measure the field generated by the current flow. Because there is no electrical connection between the current path and sensing circuit, it provides a minimum of 800 volts of isolation without the use of additional components.

Only 1.7 mm high, the ACS704 provides a monolithic solution that is much smaller than other integrated current path Hall-effect sensor ICs with comparable sensitivity, and with greater accuracy, sensitivity, and creepage and clearance distances than "trace-straddling" sensor ICs.

Accuracy at 25°C typically exceeds 1.5%, and the sensor is compliant to lead-free directives. The 1.5 mohm resistance of the sensor provides extremely low power loss and voltage drop. The sensor IC operates from a single, +5V supply, and the output is ratiometric to the supply voltage.

This new current sensor IC is targeted to meet the needs of the industrial, consumer, communications and automotive markets. End applications including motor control and protection, small electric vehicles, battery monitoring and charge control, power distribution and monitoring, and personal UPS systems.

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