ALS31000 Datasheet | Allegro MicroSystems

Unidirectional Linear Hall-Effect Sensor IC with Analog Output in Miniature Low-Profile Surface-Mount Package Features AND BENEFITS - 5 V supply operation - QVO temperature coefficient programmed at Allegro™ for improved accuracy - Miniature package options - High-bandwidth, low-noise analog output - High-speed chopping scheme minimizes QVO drift across operating temperature range - Temperature-stable quiescent voltage output and sensitivity - Precise recoverability after temperature cycling - Output voltage clamps provide short-circuit diagnostic capabilities - Undervoltage lockout (UVLO) - Wide ambient temperature range: - 40°C to 150°C - Immune to mechanical stress - Enhanced EMC performance for stringent automotive applications Package: 3-pin SOT23-W 2 mm × 3 mm × 1 mm (suffix LH) Not to scale DESCRIPTION New applications for linear output Hall-effect sensors, such as displacement and angular position, require higher accuracy and smaller package sizes. The Allegro 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 m V/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 Bi CMOS monolithic circuit integrates: a Hall element,...