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Microsemi expands smart sensor interface portfolio

06 Aug 2015  | Graham Prophet

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Microsemi's has uncloaked what it describes as the first device in its line-up of smart sensor interface ICs. The LX3301A claims to be the first inductive sensor IC based upon linear variable differential transformer (LVDT) architecture implementations on PCBs: Microsemi designed it for automotive and industrial applications.


The LX3301A sensor interface IC s use of LVDT principles, gives superior immunity to noise and interference. Microsemi said its technology can replace Hall-effect sensors currently used in the marketplace, as these magnet-based sensors are susceptible to external magnetic fields and/or metal objects in close proximity. Inductive technology eliminates the magnet, thereby improving immunity to such interference.

The device is suitable for a variety of applications related to control systems and industrial automation, specifically linear displacement measurement (fluid level sensing, gear position for transmission actuator position and brake lamp switch/proximity detection) and angular motion measurement (robotic arm position, rotating shaft position, pedal position and rotary controls). It also meets strict automotive application requirements, including AECQ100-certified grade 1, ISO26262 compliance and production part approval process (PPAP) documentation support.

Features include: contactless sensing (high reliability); embedded 32bit processing engine with 12KB programme memory; two sensor input channels with integrated demodulator; internal oscillator with frequency range of 1MHz to 5MHz; dual 13bit ADC with sample rates to 2kHz; user-programmable 16 x 16bit non-volatile configuration memory; and automotive support team to ensure successful adoption.

The LX33xx sensor IC family can be used with Microsemi's motor drive reference design using the SmartFusion2 system-on chip (SoC) field programmable gate array (FPGA) and a motor control IP suite to process the sensor inputs and motor drive algorithms. The sensor inputs can be connected to the motor control evaluation board.

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