Fully Integrated, Hall Effect-Based Linear Current Sensor ICwith 2.1 kVRMS Isolation and a Low-Resistance Current Conductor

The Allegro™ ACS713 provides economical and precisesolutions for DC current sensing in industrial, commercial, andcommunications systems. The device package allows for easyimplementation by the customer. Typical applications includemotor control, load detection and management, switch-modepower supplies, and overcurrent fault protection. The deviceis not intended for automotive applications.The device consists of a precise, low-offset, linear Hall circuitwith a copper conduction path located near the surface of thedie. Applied current flowing through this copper conductionpath generates a magnetic field which the Hall IC converts into aproportional voltage. Device accuracy is optimized through theclose 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 programmedfor accuracy after packaging.The output of the device has a positive slope (>VIOUT(Q))when an increasing current flows through the primary copperconduction path (from pins 1 and 2, to pins 3 and 4), which isthe path used for current sampling. The internal resistance ofthis conductive path is 1.2 mΩ typical, providing low powerloss. The thickness of the copper conductor allows survival of the device at up to 5× overcurrent conditions. The terminals of theconductive path are electrically isolated from the signal leads (pins5 through 8). This allows the ACS713 to be used in applicationsrequiring electrical isolation without the use of opto-isolators orother costly isolation techniques.The ACS713 is provided in a small, surface mount SOIC8 package.The leadframe is plated with 100% matte tin, which is compatiblewith standard lead (Pb) free printed circuit board assembly processes.Internally, the device is Pb-free, except for flip-chip high-temperaturePb‑based solder balls, currently exempt from RoHS. The device isfully calibrated prior to shipment from the factory.