CURRENT SENSOR ACS 712 20A

The ACS712 20A Current Sensor Module uses a precise, low-offset linear Hall circuit with a copper conduction path near the die surface. Current flowing through the copper path generates a magnetic field that the Hall IC converts into a proportional voltage output, allowing accurate AC or DC current measurement up to 20A via an Arduino analog I/O pin.

Widely used in over-current protection circuits, battery chargers, switching mode power supplies, digital wattmeters, and programmable current sources.

Features:

1. Low-noise analog signal path
2. Device bandwidth set via FILTER pin
3. 5 µs output rise time in response to step input current
4. Small footprint SOIC8 package
5. 2.1 kV RMS minimum isolation voltage (pins 1–4 to pins 5–8)
6. 5V single-supply operation
7. 66 to 185 mV/A output sensitivity
8. Output voltage proportional to AC or DC current
9. Factory-trimmed for accuracy
10. Extremely stable output offset voltage
11. Nearly zero magnetic hysteresis
12. Ratiometric output from supply voltage