Galvanically Isolated Current Sensor - Allegro
Description
ACS71240
Automotive-Grade, Galvanically Isolated Current Sensor IC with Common-Mode Field Rejection and Overcurrent Detection
in Small Footprint Low-Profile Packages
FEATURES AND BENEFITS
• AEC-Q100 automotive qualified • Differential Hall sensing rejects common-mode fields • Integrated shield virtually eliminates capacitive coupling
from current conductor to die, greatly suppressing output noise due to high dv/dt transients • Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and filter design techniques • High bandwidth 120 kHz analog output for faster response times in control applications • Patented integrated digital temperature compensation circuitry allows for near closed-loop accuracy over temperature in an open-loop sensor • Single supply operation with nonratiometric output at 3.
3 and 5 V options • Overcurrent FAULT available between 50% and 200% IP with 1.
5 µs (typ) response time • Nonratiometric output provides immunity to noisy supplies • Small footprint QFN-12 with wettable flank and SOIC-8 suitable for space-constrained automotive applications • 0.
6 mΩ (QFN-12) or 1.
2 mΩ (SOIC-8) primary conductor resistance for low power loss and high inrush current withstand capability • UL certified package (SOIC-8 only) for voltage isolation
PACKAGES:
12-contact QFN with wettable flank
8-pin SOIC
3 mm × 3 mm × 0.
75 mm
with internally fused path
(EXB package) Not to scale (LCB package)
DESCRIPTION
The Allegro™ ACS71240 current sensor IC is an economical and precise solution for AC or DC current sensing in industrial, automotive, commercial, and communications applications.
The device consists 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 path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage.
The resistance of the integrated conductor is...
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