Targeting automotive applications among others, the 1.7 mm high sensors are available in 15 amp and 5 amp versions. They measure bidirectional ac or dc currents by measuring the field generated by the current flow. They offer a minimum of 800 V of isolation without the use of additional components because no electrical connection exists between the current path and sensing circuit.

Allegro’s sensors are said to provide a monolithic solution smaller than other integrated current path Hall-effect sensors that specify comparable sensitivity, and to offer better accuracy, more sensitivity, and greater creepage and clearance distances than trace-straddling sensors. Accuracy typically exceeds 1.5% at 25 degrees C, the company said.

The sensors operate from a single +5 V supply and have an output ratiometric to the supply voltage. Resistance is 1.5 milliOhms, which contributes to low power loss and voltage drop.