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High-Performance Power ICs and Hall-Effect Sensors
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. 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.
Allegro MicroSystems, Inc. is a leading supplier of advanced mixed-signal power semiconductors and Hall-effect sensors targeted toward the computer/office, automotive, industrial, telecommunication and consumer markets. With over 2,400 employees, Allegro is headquartered in Worcester, MA. Further information on 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