Dual die, Hall effect, latch and switch sensor is accurate & redundant

Dual die, Hall effect, latch and switch sensor is accurate & redundant

New Products |
By Graham Prophet

Integrating two ICs into a single package provides the redundant operation that is crucial to meet the reliability requirements of the automotive market. It also means that a significant improvement can be made in terms of accuracy – as the sensitive points are closer together than they would be with discrete devices housed in separate packages. The first products that are available with this packaging concept are the MLX92292 and MLX92232.


MLX92232 is a second-generation programmable Hall effect sensor designed using mixed signal CMOS technology. This dual die device incorporates a voltage regulator, Hall sensing functionality (with advanced offset cancellation system) and an open-drain output driver, all in a single package. It is supplied in a 4-pin through-hole format.


The 3-wire μPower Melexis MLX92292 comes in an 8-pin surface mount SO-8 package. It delivers the expected switch functionality but, unlike existing products, can determine the presence of magnetic fields that are lateral, not just orthogonal, to it. The product supports ASIL B functional safety (in accordance with ISO 26262), with an array of built-in diagnostic mechanisms providing highly reliable operation in automotive applications.


Both of these products can be pre-programmed to meet specific application requirements. In addition, OEM customers can benefit from the flexibility of factory programming to give them complete in-system optimization at their own production lines. The programming capability also enables setting of both magnetic operating points to small increments across a range spanning -90 mT to +90 mT (-40 mT to +40 mT for lateral sensing versions).


Melexis has a video clip in which the dual die concept is explained.





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