Allegro MicroSystems, LLC Introduces New Unidirectional, Factory Programmed Linear Hall IC In Surface Mount Package

Ideal for Use in Automotive and Industrial Applications Requiring High Accuracy and Operation

Allegro MicroSystems, LLC announces a new linear hall IC targeted at the automotive and industrial markets. New applications for linear output Hall-effect sensor ICs, such as displacement and angular position, require higher accuracy and smaller package sizes. Allegro’s ALS31000 linear Hall-effect sensor IC has been designed specifically to meet both requirements.

The accuracy of this device is enhanced via end-of-line optimization. The ALS31000 features non-volatile memory to optimize device sensitivity and the quiescent voltage output (QVO: output in the absence of a magnetic field) for a given application or circuit. Optimized performance is sustained across the full operating temperature range by programming the temperature coefficient for both sensitivity and QVO at Allegro end-of-line test.

This ratiometric Hall-effect sensor IC provides a voltage output proportional to the applied magnetic field. The quiescent voltage output is adjusted to around 0.7 V and the output sensitivity is set to 2.4 mV/G. The features of this linear device make it ideal for use in automotive and industrial applications requiring high accuracy and operation across an extended temperature range, –40°C to 150°C. Each BiCMOS monolithic circuit integrates: a Hall element, temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, a clamped low-impedance output stage, and a proprietary dynamic offset cancellation technique.

Allegro’s ALS31000 sensor IC family is offered in the LH package style: a SOT-23W style, miniature, low-profile package for surface-mount applications. The package is lead (Pb) free, with 100% matte-tin leadframe plating.