ACS781KLR Datasheet | Allegro MicroSystems

ACS781x LR High-Precision Linear Hall-Effect-Based Current Sensor IC with 200 µΩ Current Conductor Features AND BENEFITS - Core-less, micro-sized, 100 A continuous current package - Ultra-low power loss: 200 µΩ internal conductor resistance - Immunity to mon-mode field interference - Greatly improved total output error through digitally programmed and pensated gain and offset over the full operating temperature range - Industry-leading noise performance through proprietary amplifier and filter design techniques - Integrated shield greatly reduces capacitive coupling from current conductor to die due to high d V/dt signals, and prevents offset drift in high-side, high-voltage applications - Monolithic Hall IC for high reliability - 3 to 3.6 V, single supply operation - 120 k Hz typical bandwidth - 3.6 µs output rise time in response to step input current - Output voltage proportional to AC or DC currents - Factory-trimmed for accuracy - Extremely stable quiescent output voltage - AEC-Q100 automotive qualification PACKAGE: 7-pin PSOF package (suffix LR) DESCRIPTION The Allegro ACS781x LR 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 mon-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 proximity of the primary conductor to the Hall transducer and factory programming of the sensitivity and quiescent output voltage at the Allegro factory. Chopper-stabilized...