High-precision linear hall-effect-based current sensor IC with 200 µΩ current conductor


Allegro - ACS780/ACS781 Current sensor ICs

The Allegro ACS780xLR is a fully integrated current sensor
linear IC in a new core-less package designed to sense AC and DC currents up to
100 A. This automotive-grade, low-profile (1.5 mm thick) sensor IC package has
a very small footprint. The Hall sensor technology also incorporates
common-mode field rejection to optimize performance in the presence of
interfering magnetic fields generated by nearby current-carrying conductors.
The device consists of a precision, low-offset linear Hall circuit with a
copper conduction path located near the die. Applied current flowing through
this copper conduction path generates a magnetic field which the Hall IC
converts into a proportional voltage. Device accuracy is optimized through the
close proximity of the primary conductor to the Hall transducer and factory
programming of the sensitivity and quiescent output voltage at the Allegro factory.