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Hall Effect sensing devices serve automotive applications

Thu, 04/05/2012 - 12:08pm

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Hall Effect sensorsThe MLX92221 and MLX92241 Hall Effect sensors from Melexis are designed to deliver the high levels of performance and robustness needed for the stringent automotive requirements of applications such as seat positioning systems, seat adjusters, seatbelt buckle switches, wipers and motor commutation systems.

These devices are equipped with an EEPROM memory, allowing the setting of customer-specific parameters for magnetic switch points, output polarity, IOFF current and magnet material temperature compensation coefficient. The customer’s ability to specify tailored characteristics will enable improvements to their sensor module yields, bill-of-materials (BOM) costs and performance capabilities.

With a wide programmable magnetic range, the MLX92221 and MLX92241 both feature Hall Effect sensing elements operating from 2.7 V to 24 V voltage levels, addressing automotive, consumer and industrial applications. These devices integrate protection mechanisms to guard against electro-static discharge (ESD), reverse supply voltage and thermal overload. The reverse supply voltage protection protects the devices against incorrect connection of the supply line, up to -24 V.

The core magnetic sensor circuit in the devices of this platform is re-engineered with a special focus on the offset cancellation system, allowing faster and more accurate processing that is unaffected by temperature. A programmable negative temperature coefficient is implemented to compensate for the natural behavior of permanent magnets to become weaker at elevated temperatures.

The MLX92221 and MLX92241 are delivered in RoHS compliant single-in-line (SIL) packages for through-hole mounting, or in 3-pin thin SOT (TSOT) packages for surface mounting.

A range of standard versions of the MLX92221 and MLX92241 are available. For high volume production and tailored versions please consult your local Melexis contact.

For more information visit www.melexis.com
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