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Allegro MicroSystems

The A3150JLT and A3150JUA programmable switches provide tooth/valley recognition in large gear-tooth sensing applications. Each sensor consists of a single element, chopper-stabilized Hall-effect IC that can be programmed to the desired magnetic switch point, optimizing sensor airgap and timing accuracy performance after final packaging. The small package can be easily assembled and used in conjunction with a wide variety of gear/target shapes and sizes. The two devices differ only in package style.
The sensing technology used for this sensor is Hall-effect based. The sensor incorporates a single-element Hall IC that switches in response to magnetic signals created by a ferrous target. The program mability of the circuit eliminates magnet and system offsets such as those caused by tilt yet provides zero-speed detection capabilities without the associated running jitter inherent in classical digital solutions.
Two package styles provide a magnetically optimized package for most applications. Suffix ‘–LT’ is a miniature SOT-89/TO-243AA transistor package for surface-mount applications; while suffix ‘–UA’ is a three-lead ultra-mini-SIP for through-hole mounting.

■ Chopper Stabilized for
   Extremely Low Switch-Point Drift and
   Immunity to Mechanical Stress
■ Externally Programmed Switch Point
■ On-Chip Supply-Transient Protection
■ Output Short-Circuit Protection
■ Single-Chip Sensing IC for High Reliability
■ Small Mechanical Size
■ <50 µs Power-On Time
■ Wide Operating Voltage Range
■ Defined Power-On State

other parts : 3150  A3150  A3150J  A3150JLT  


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