Features and Benefits ? Low-noise analog signal path ? Device bandwidth is set via the new FILTER pin ? 5 μs output rise time in response to step input current ? 50 kHz bandwidth ? Total output error 1.5% at TA= 25°C, and 4% at –40°C to 85°C ? Small footprint, low-profile SOIC8 package ? 1.2 m? internal conductor resistance ? 2.1 kVRMS minimum isolation voltage from pins 1-4 to pins 5-8 ? 5.0 V, single supply operation ? 66 to 185 mV/A output sensitivity ? Output voltage proportional to AC or DC currents ? Factory-trimmed for accuracy ? Extremely stable output offset voltage ? Nearly zero magnetic hysteresis ? Ratiometric output from supply voltage

Description The Allegro? ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, automotive, commercial, and communications 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 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 the close proximity of the magnetic signal to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging. The output of the device has a positive slope (>VIOUT(Q)) when an increasing current flows through the primary copper conduction path (from pins 1 and 2, to pins 3 and 4), which is the path used for current sensing. The internal resistance of this conductive path is 1.2 m? typical, providing low power

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