New Original IC ACS724LLCTR-10AB-T

The Allegro™ ACS724 current sensor IC is an economical andprecise solution for AC or DC current sensing in industrial,automotive, commercial, and communications systems. Thesmall package is ideal for space-constrained applicationswhile also saving costs due to reduced board area. Typicalapplications include motor control, load detection andmanagement, switched-mode power supplies, and overcurrentfault protection.The device consists of a precise, low-offset, linear Hallsensor circuit with a copper conduction path located near thesurface of the die. Applied current flowing through this copperconduction path generates a magnetic field which is sensedby the integrated Hall IC and converted into a proportionalvoltage. The current is sensed differentially in order to rejectcommon-mode fields, improving accuracy in magneticallynoisy environments. The inherent device accuracy is optimizedthrough the close proximity of the magnetic field to the Halltransducer. A precise, proportional voltage is provided by thelow-offset, chopper-stabilized BiCMOS Hall IC, which isprogrammed for accuracy after packaging. The output of thedevice has a positive slope when an increasing current flowsthrough the primary copper conduction path (from pins 1 and2, to pins 3 and 4), which is the path used for current sensing.The internal resistance of this conductive path is 1.2 mΩ typical,providing low power loss.The terminals of the conductive path are electrically isolatedfrom the sensor leads (pins 5 through 8). This allows theACS724 current sensor IC to be used in high-side current senseapplications without the use of high-side differential amplifiersor other costly isolation techniques.

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