Inductor sensor interface ICs use LVDT-on-PCB structures: replace Hall devices

Inductor sensor interface ICs use LVDT-on-PCB structures: replace Hall devices

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By eeNews Europe

The LX3301A sensor interface IC’s use of LVDT principles, gives superior immunity to noise and interference. Microsemi says 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:

  1. Contactless sensing (high reliability);
  2. Embedded 32-bit processing engine with 12 kB program memory;
  3. Two sensor input channels with integrated demodulator;
  4. Internal oscillator with frequency range of 1 to 5 MHz;
  5. Dual 13-bit ADC with sample rates to 2 kHz;
  6. User-programmable 16×16-bit non-volatile configuration memory;
  7. 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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