Microsemi Expands Industry's First Family of Inductive Sensor Interface ICs Based upon LVDT Architecture Implementations on PCBs

ALISO VIEJO, CA -- Microsemi Corporation announces the availability of a new device in its recently launched family of sensor interface integrated circuits (ICs) based upon inductive sensing technology, the LX3302. As the newest addition to the industry's first inductive sensor interface IC product family utilizing linear variable differential transformer (LVDT) architecture implementations on printed circuit boards (PCB), Microsemi's LX3302 is specially designed for applications within the automotive, industrial and commercial aviation markets.

Microsemi's LX3302 improves the LX3301A with an extended temperature range to 150 degrees Celsius, and a richer set of system interfaces which include analog sine/cosine outputs, single edge nibble transmission (SENT) and Peripheral Sensor Interfaces (PSI5), as well as the standard analog output and pulse width modulated (PWM) output. In addition, the LX3302 has double the EEPROM available in the LX3301A, allowing for eight-point calibration, versus six-point calibration, which increases system accuracy by 1-bit and permits less precise, lower cost sensor manufacturing. Leveraging Microsemi's expertise in inductive sensing technology and its more than five years' experience supplying customized ICs in production, the new device features LVDT principles, resulting in superior immunity to noise and interference.

"Microsemi is excited to expand our market opportunities with the LX3302, as our inductive sensing technology can replace the incumbent Hall-effect sensors, which are susceptible to external magnetic fields and/or metal objects in close proximity. Inductive technology eliminates the magnet, thereby improving immunity to such interference," said Shafy Eltoukhy, vice president and business unit manager at Microsemi. "Customers can use this emerging technology in a wide variety of mechanical motion sensing applications, as it provides significant improvement in temperature stability, reliability, safety and system costs."

As sensors are the key element in the feedback loop of virtually all closed loop systems, the LX3302 is ideal for a variety of applications related to control systems and industrial automation, including 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 0, and comes with Production Part Approval Process (PPAP) documentation support. Microsemi's experienced automotive support team is also provided to ensure customer success with the product.

Additional features include:
•Contactless sensing, ensuring high reliability
•Internal temperature sensor
•-40 to 150 degrees Celsius operating temperature/qualified to AEC-Q100 grade 0
•Embedded pre-programmed, configurable microcontroller
•Integrated oscillator and demodulator
•Two independent sensor input channels with 13-bit analog-to-digital converters (ADCs)
•Programmable sample rates to 2 kilohertz (kHz)
•Input electromagnetic interference (EMI) filters
•32 x 16 words of user programmable configuration EEPROM
•Built-in diagnostics and ISO26262 compliance
•Outputs: 0 to 5 volts (V) analog, PWM, analog sine/cosine, serial interfaces (SENT and PSI5)
•Eight calibration segments (for shaping and output response)

The implementation of sensors continues to expand throughout the automotive and industrial markets. For example, according to MEMS Journal, the number of new light vehicles (cars and light trucks) shipped worldwide will grow from approximately 85 million in 2014 to 110 million by 2020. These vehicles currently feature an average of 60-100 sensors on board, but as cars are rapidly getting "smarter," the number of sensors is projected to reach as many as 200 sensors per car. This translates to approximately 22 billion sensors used in the automotive industry per year by 2020.

The LX3302 and other products in the LX33xx sensor IC family can be used with Microsemi's motor drive reference design utilizing the company's SmartFusion™2 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. For information, visit http://www.microsemi.com/applications/motor-control.


Pre-production samples of Microsemi's LX3302 are available now, with full production release in March 2016. For more information, visit http://www.microsemi.com/existing-parts/parts/136911. For more information, visit http://www.microsemi.com/product-directory/ics/3388-sensor-interface

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