ACS712 Datasheet – Hall Effect Current Sensor – Allegro

Part Number: ACS712, ACS712ELCTR-05B-T

Function : Fully Integrated / Hall Effect-Based Linear Current Sensor

Package: SOIC 8 Pin

Manufacturer: Allegro MicroSystems


ACS712 hall sensor


The Allegro ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, 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.


ACS712 datasheet pinout

Features and Benefits

1. Low-noise analog signal path

2. Device bandwidth is set via the new FILTER pin

3. 5 μs output rise time in response to step input current

4. 80 kHz bandwidth

5. Output voltage proportional to AC or DC currents

6. Factory-trimmed for accuracy

7. Extremely stable output offset voltage

8. Nearly zero magnetic hysteresis

9. Ratiometric output from supply voltage


Terminal List Table

Number | Name | Description
1 and 2, IP+ : Terminals for current being sensed; fused internally
3 and 4, IP– : Terminals for current being sensed; fused internally
5, GND : Signal ground terminal
6, FILTER : Terminal for external capacitor that sets bandwidth
7, VIOUT : Analog output signal
8, VCC : Device power supply terminal


Reference Site:


ACS712 Datasheet