Allegro Hall Effect Linear Current Sensor 20A 80kHz SOIC8

The Allegro ACS712ELCTR-20A-T is a fully integrated, Hall-effect-based linear current sensor IC designed for economical and precise AC or DC current sensing in industrial, commercial, and communications systems. This surface-mount device features a low-resistance current conductor, enabling easy implementation with excellent accuracy.

The sensor operates on a principle where current flowing through an internal copper conduction path generates a magnetic field, which is converted into a proportional voltage by a precise, low-offset linear Hall circuit. Its performance is optimised by the close proximity of the magnetic signal to the Hall transducer, resulting in highly stable readings.

Key Features & Performance

• Offers a current sensing range of ±20A, suitable for bidirectional measurement.
• Features a typical frequency bandwidth of 80kHz for fast response applications.
• Operates from a 4.5V to 5.5V supply voltage, with a ratiometric output for simplified interfacing.
• Boasts a low primary conductor resistance of 1.20mΩ, minimising power loss and heat generation.
• Provides a low-noise analog signal path, with device bandwidth configurable via a dedicated FILTER pin.
• Delivers a rapid 5µs output rise time in response to a step input current.
• Exhibits an extremely stable output offset voltage with nearly zero magnetic hysteresis.
• The output voltage is factory-trimmed for accuracy, proportional to the sensed AC or DC currents.

Housed in a compact 8-pin SOIC package, this robust sensor is designed for reliable operation across an extensive temperature range from -40°C to 85°C. It is an ideal solution for integrating precise current monitoring into electronic designs.