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Current sensors make automotive cut

Posted: 26 Dec 2007 ?? ?Print Version ?Bookmark and Share

Keywords:Allegro current sensors? automotive application?

Allegro Microsystems Inc. has come up with two current sensors engineered to provide economical and precise sensing products for AC and DC currents in automotive applications.

The ACS714 and ACS715 devices are designed and tested to meet the stringent requirements of automotive applications. The ACS714 and ACS715 are similar to the ACS712 and ACS713 devices, which are specialized for low current sensing in non-automotive applications. The differences are realized in the more rigorous test regiment over the full automotive temperature range (-40 C to +150 C) and the greater detail in the specification for error components. The latter will allow customers to determine the total error for the given system based.

The devices consist of a precise, low-offset, 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. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging.

Both devices are provided in a small, surface mount SOIC8 package.

The ACS714/15 cost $1.39 and $1.46 for the extended ("E") and automotive ("L") temperature ranges, respectively.

- Ismini Scouras

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