Datasheet ACS780xLR (Allegro)

ACS780xLR High-Precision Linear Hall-Effect-Based Current Sensor IC With 200 µΩ Current Conductor FEATURES AND BENEFITS DESCRIPTION
▪ Core-less, micro-sized, 100 A continuous current package The Allegro ACS780xLR is a fully integrated current sensor ▪ Ultra-low power loss: 200 µΩ internal conductor linear IC in a new core-less package designed to sense AC and resistance DC currents up to 100 A. This automotive-grade, low-profile ▪ Immunity to common-mode field interference (1.5 mm thick) sensor IC package has a very small footprint. ▪ Greatly improved total output error through digitally The Hall sensor technology also incorporates common-mode programmed and compensated gain and offset over the full field rejection to optimize performance in the presence of operating temperature range interfering magnetic fields generated by nearby current-carrying ▪ Industry-leading noise performance through proprietary conductors. amplifier and filter design techniques The device consists of a precision, low-offset linear Hall circuit ▪ Integrated shield greatly reduces capacitive coupling from with a copper conduction path located near the die. Applied current conductor to die due to high dV/dt signals, and current flowing through this copper conduction path generates prevents offset drift in high-side, high-voltage applications a magnetic field which the Hall IC converts into a proportional ▪ Monolithic Hall IC for high reliability voltage. Device accuracy is optimized through the close ▪ 4.5 to 5.5 V, single supply operation proximity of the primary conductor to the Hall transducer and ▪ 120 kHz typical bandwidth factory programming of the sensitivity and quiescent output ▪ 3.6 µs output rise time in response to step input current voltage at the Allegro factory. ▪ Output voltage proportional to AC or DC currents ▪ Factory-trimmed for accuracy Chopper-stabilized signal path and digital temperature ▪ Extremely stable quiescent output voltage compensation technology also contribute to the stability of the ▪ AEC-Q100 automotive qualification device across the operating temperature range. High-level immunity to current conductor dV/dt and stray
PACKAGE:
electric fields is offered by Allegro proprietary integrated shield
7-pin PSOF package (suffix LR)
technology, for low-output voltage ripple and low-offset drift in high-side, high-voltage applications. The output of the device has a positive slope (>VCC / 2) when an increasing current flows through the primary copper conduction Continued on the next page… Not to scale
ACS780xLR
RF 5 3 IP+ VOUT VOUT CF I 2 P GND 5 V CBYP 6 IP– 0.1 µF 1 VCC
Typical Application Application 1: The ACS780xLR outputs an analog signal, VOUT , that varies linearly with the bidirectional AC or DC primary current, IP , within the range specified. CF is for optimal noise management, with values that depend on the application.
ACS780xLR-DS, Rev. 4 February 7, 2019 MCO-0000275