This part is a kind of semiconductor called ACS723.

Function of this product has Galvanically Isolated Current Sensor IC.

Manufacturers : Allegro MicroSystems

Image and pinout :

Some of the text within the PDF file :

ACS723 High Accuracy, Galvanically Isolated Current Sensor IC With Small Footprint SOIC8 Package FEATURES AND BENEFITS • Patented integrated digital temperature compensation circuitry allows for near closed loop accuracy over temperature in an open loop sensor • UL60950-1 (ed. 2) certified □□Dielectric Strength Voltage = 2.4 kVrms □□Basic Isolation Working Voltage = 420 Vpk/297 Vrms • Industry-leading noise performance with greatly improved bandwidth through proprietary amplifier and filter design techniques • Pin-selectable band width: 80 kHz for high bandwidth applications or 20 kHz for low noise performance. • 0.65 mΩ primary conductor resistance for low power loss and high inrush current withstand capability • Small footprint, low-profile SOIC8 package s [ ... ]

ACS723 PDF Datasheet Download