ACS726 Datasheet | Allegro MicroSystems

Features AND BENEFITS - Fully differential architecture for improved immunity to offset drift and mon mode noise - Spare differential back end amplifier for externally adjustable gain and bandwidth using simple RC networks - Greatly improved bandwidth through proprietary amplifier and filter design techniques - High bandwidth 120 k Hz analog output - Patented integrated digital temperature pensation circuitry allows nearly closed-loop accuracy, through entire temperature range, in an open loop sensor - 1.1 mΩ primary conductor resistance for low power loss and high inrush current withstanding capability - Small footprint, low-profile QSOP24 package suitable for space-constrained applications - Integrated shield virtually eliminates capacitive coupling from current conductor to die due to high d V/dt voltage transients Continued on the next page… Package: 24-pin QSOP (suffix LF) DESCRIPTION The Allegro™ ACS726 current sensor IC family provides economical and precise solutions for AC current sensing in industrial, mercial, and munications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection. The fully differential output gives superior immunity to output offset drift as well mon mode noise. ACS726 is the first current sensor IC to include a fully differential back-end amplifier (BEA) that can be used to adjust gain and bandwidth via external RC networks. The BEA is fully independent and when unused, it can be powered down to reduce power consumption. 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 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 proximity of the...