Date: 23/05/2012

3.3V linear Hall-Effect sensor IC from Allegro for automotive and industrial markets

Allegro MicroSystems, Inc has announced a new current sensor IC, ACS759. This integrated circuit provides a precise solution for AC or DC current sensing in 3.3 V supply applications. This new device is targeted at the automotive and industrial markets. Typical applications include motor control, load detection and management, power supply and DC-to-DC converter control, inverter control, and over-current fault detection.

The device consists of a precision, low-offset linear Hall 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 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. The output of the device has a positive slope (>VCC / 2) when an increasing current flows through the primary copper conduction path (from terminal 4 to terminal 5), which is the path used for current sensing.

Features:
1. Internal resistance: 100 micro-Ohm typical
2. 200 A - continuous current sense
3. Heavy gauge leadframe is made of oxygen-free copper
4. The terminals of the conductive path are electrically isolated from the sensor leads (pins 1 through 3)
5. Fully calibrated prior to shipment from the factory
6. Lead (Pb) free
7. All leads are plated with 100% matte tin
8. Available in a 5-pin CB package

For more information www.allegromicro.com