ACS712 20A Hall Current Sensor Module SMD SOP8 SOIC8

ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems. ACS712 is a fully integrated, Hall-effect-based linear sensor IC that can sense up to 20A of current flow. This device operates at a supply voltage of 5V in which output is proportional to AC or DC current. Using the Indirect Sensing method ACS712 calculates the current. In order to sense current a liner, low-offset, precise Hall sensor circuit used in this IC. This device placed at the surface of the IC on a copper conduction path. When the applied current flows through this copper conduction path it generates a magnetic field sensed by the Hall effect sensor. Hall Sensor generates a voltage proportional to the sensed magnetic field, used to measure current. The present output current signal read via the analog I / O port of a microcontroller or an Arduino.

The range of the magnetic signal to the Hall sensor decides the accuracy of the device. Closer the magnetic signal higher the accuracy. ACS712 designed as a compact-sized, surface mount SOIC8 package. In this ACS712 Current Sensor IC, Pin-1 to Pin-4 forms the conduction path where the current sensed. Pin-5 represents the signal ground pin. Pin-6 indicates the FILTER pin by an external capacitor to set the bandwidth. Pin-7 is the analog output pin. Pin-8 is the power supply pin. ACS712 used in a wide range of applications where sensing and controlling current flow is fundamental such as over-current protection circuits’ battery chargers, switching mode power supplies, digital watt meters, programmable current sources, etc. Moreover, ACS712 has nearly zero magnetic hystereses.