They feature a differential Hall array, which helps eliminate the influence of stray magnetic fields.
The sensors are in stock at authorised distributor DigiKey.
A low-resistance primary conductor routes the current close to the IC, where high-precision Hall effect sensors are integrated. The current produces a magnetic field detected at two distinct points by the Hall transducers.
The difference in the magnetic field at these locations is converted into a voltage signal that accurately reflects the applied current.
A spinning current technique is employed to maintain a low and stable offset.
Galvanic isolation between the primary conductor path and the sensor pins enables the MCQ1805 to serve as a replacement for optoisolators and other isolation solutions. The device offers fast overcurrent detection (OCD), enabling real-time monitoring and response to overcurrent (OC) conditions.
Requiring only a few standard, easily sourced external components, the MCQ1805 comes in a compact SOIC-8 package, making it ideal for use in applications with limited board space.
The sensors offer 3.3 V or 5 V single-supply options and are immune to external gradient magnetic fields via differential sensing. They achieve ±2.5% total accuracy and deliver a 120 kHz bandwidth.
The sensors are factory-trimmed for accuracy.
Applications cover automotive systems; motor controls; load detection and management; switched-mode power supplies; and OC fault protection.
