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Allegro MicroSystems, Inc. Introduces a Fully Integrated
±100 A Open Loop Current Sensor
Simplify Manufacturing with a Precise and Economical Solution for
Current Sensing 
Worcester, MA, September 2002 — Allegro
MicroSystems, Inc. announces a fully integrated ±100 A open
loop current sensor IC. This is a revolutionary step involving the continued
use of linear Hall-effect sensor devices in current sensing applications.
The use of a programmable linear Hall-effect device provides for improved
accuracy and linearity as well as very low thermal drift. The electro-mechanical
package is an innovative step towards a fully integrated current sensing
solution. Customers no longer need to design and manufacture their
own magnetic circuit. The small package, 10 mm x 13 mm x 7 mm, consists
of two primary power conductive leads, which allow current to pass
through a ferrite core over the sensing element of a 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 particular device,
the ACS750ECA-100 has
a bandwidth of 13 KHz and future family members will be capable of
higher bandwidth and alternative maximum current limits. The device
provides customers with a small, precise and economical solution for
current sensing.
In addition to Allegro's ACS750ECA-100 being a monolithic Hall IC that provides extremely high reliability, the package also offers extremely low power loss, as the internal resistance is less than 1 milli-ohm. The power leads are electrically isolated from the sensing circuitry. This allows use of the device in applications where isolation is a requirement without the added expense of opto-isolators or other costly isolating techniques.
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
Technical Contact:
Gary Pepka
Strategic Marketing Manager
Tel: (603) 228-5533
gpepka@allegromicro.com