Allegro current sensors available from Solid State

The high-current devices incorporate Allegro's amplifier and filter designs to enable noise performance down to 3mV (typ) for 10nF on VIOUT pin to GND.

This Hall-effect-based current sensor range also features increased bandwidth of 120kHz and low internal resistance of 100u microns, leading to ultra-low power loss.

Each device consists of a precision, low-offset linear Hall-effect sensor circuit with a copper conduction path located near the die.

Applied current flowing through this copper conduction path generates a magnetic field, which is sensed by the integrated Hall IC and converted into a proportional voltage.

Device accuracy is optimised through the close proximity of the conduction path to the Hall transducer.

A precise, proportional output voltage is provided by the low-offset, chopper-stabilised BiCMOS Hall IC, which is factory trimmed for accuracy.

The ACS758 range can be used for AC or DC current sensing in the range 50 to 200A, 3.0 to 5.5V.

The thickness of the copper conductor allows survival of the device at up to five times over-current conditions.

The terminals of the conductive path are electrically isolated from the sensor leads, allowing the ACS758 range to be used in applications requiring electrical isolation without the use of opto-isolators or other costly isolation techniques.

Allegro's integrated shield technology reduces capacitive coupling from current conductor to die due to high dV/dt signals, and prevents offset drift in high-side, high-voltage applications.

The ACS758's compact form factor and mounting capability means the range is suited to applications including motor control, load detection and management, power supply and DC-DC converter control, inverter control and over-current fault detection.