ACS712 Current Sensor IC

Allegro's ACS712 current sensor IC is a fully integrated linear Hall effect linear current sensor

Image of Allegro MicroSystems' Allegro® ACS712 Current Sensor ICAllegro MicroSystems' 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. The device is not intended for automotive applications.

The device consists of a precise, low-offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field that is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic signal to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging.

The ACS712 is provided in a small surface-mount SOIC8 package. The leadframe is plated with 100 percent matte tin, which is compatible with standard lead (Pb) free printed circuit board assembly processes. Internally, the device is Pb-free, except for flip-chip high-temperature Pb-based solder balls, currently exempt from RoHS. The device is fully calibrated prior to shipment from the factory.

Features
  • Device bandwidth is set via the new FILTER pin
  • 5 μs output rise time in response to step input current
  • Total output error 1.5% at TA = 25°C
  • Small footprint, low-profile SOIC8 package
  • 1.2 mΩ internal conductor resistance
  • 2.1 kVRMS minimum isolation voltage from
    pins 1-4 to pins 5-8
  • Output voltage proportional to AC or DC currents
  • Low-noise analog signal path
  • 5.0 V, single supply operation
  • 66 to 185 mV/A output sensitivity
  • Factory-trimmed for accuracy
  • Extremely stable output offset voltage
  • Nearly zero magnetic hysteresis
  • Ratiometric output from supply voltage
  • 80 kHz bandwidth

ACS712

ImageManufacturer Part NumberDescriptionAvailable Quantity
SENSOR CURRENT HALL 5A AC/DCACS712ELCTR-05B-TSENSOR CURRENT HALL 5A AC/DC87416 - ImmediateView Details
SENSOR CURRENT HALL 20A AC/DCACS712ELCTR-20A-TSENSOR CURRENT HALL 20A AC/DC48694 - ImmediateView Details
SENSOR CURRENT HALL 30A AC/DCACS712ELCTR-30A-TSENSOR CURRENT HALL 30A AC/DC9618 - ImmediateView Details
Published: 2012-08-09