onsemi NCS32100 Dual-Inductive Rotary Position Sensor

The NCS32100 is an innovative, easy to use, integrated solution designed for industrial applications and requirements. The onsemi solution includes the NCS32100 chip, PCB reference design for a 38 mm rotary sensor, firmware, and evaluation board.

The NCS32100 dual-inductive position sensor is a contactless absolute encoder that can provide position data even when the rotor is not moving. It consists of two PCBs: a rotor with two printed inductors (no soldered components on rotor) and a stator with printed inductors as well as an encoder IC. The accuracy is better than +/-50 arcsec for a 38mm sensor. It has full accuracy up to 6,000 RPM, and can operate at speeds up to 100,000 RPM maximum with reduced accuracy above 6,000 RPM. It has 20-bit single-turn resolution output and 24-bit multi-turn resolution output. The NCS32100 enables high accuracy at high speed with a solution that is simple and easy to use. It has an integrated MCU with firmware, and outputs position and velocity instead of raw analog signals. 

Other solutions on the market today have significant tradeoffs in one or more of the following areas: accuracy, reliability, cost, maximum speed (RPM), or size. For example, higher accuracy encoders typically come at high cost. High speed encoders typically sacrifice accuracy.

The NCS32100 is a highly configurable product that can work with different sized PCB sensor designs. It has flexible mechanical specifications (+/- 0.25mm alignment) with integrated self-calibration that accounts for PCB asymmetries and a secondary calibration that helps with mechanical errors.

The NCS32100 stands apart from other solutions by offering high accuracy (+/- 50 arcsec) AT high speed (6,000 RPM) WITH a small size (38 mm) AND high reliability (not sensitive to temperature, vibration, or contaminants) in an easy-to-use integrated solution.

Features

• Automotive proven inductive technology + new dual-inductive design
• High accuracy (+/- 50 arcsec or better)
• High Speed (up to 100,000 RPM)
• Not sensitive to temperature, vibration, or contaminants
• Integrated self-calibration that accounts for PCB asymmetries
• Secondary calibration that helps with mechanical errors
• Position and velocity output
• Position data even when not moving
• Easy to use integrated solution
  • Sensor front end
  • DSP
  • MCU
  • Firmware
• Fewer components
  • Easier to manufacture
  • Fewer points of failure
  • Fewer supply chain risks

Applications

• Industrial Automation / Robotics
• Motor Control / Positioning
• Servo Applications