This solution is simple and cost-effective as it consists of components that are off the shelf: A standard PCB, a Renesas position sensor, some passive components and a piece of metal as a target.

The sensing element is not inside the Renesas IC but is a set of coils on the PC board. The beauty of this is that the sensor as a system can be tailored and designed around the customer’s application. It uses dual inductive position sensors (IPS) for absolute position detection, optimizes the coil size, and the module package ties in with market trends (35mm motor).

System Benefits​:

  • Cost-effective and supports much higher speeds up to 250000RPM
  • The solution can be designed around the customer application, as it supports all three mechanical embodiment phases and the number of the pole pairs of the motor can be matched to the number of the sectors of the sensor.
  • The MCU has three units of ADC with channel-dedicated sample and hold function. AD conversion start can start with the synchronous trigger.
  • High accuracy: Actual resolution: 15-bit, Accuracy: 12-bit




  • Rotor position detection for BLDC; adaptable to any pole pare count
  • Replacement of brushless resolvers
  • Magnet-free rotor speed sensors

Winning Combinations Interactive Diagram

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4:3 ratio Outer Position Sensor Outer Position Sensor Outer Position Sensor Inner Position Sensor Inner Position Sensor Inner Position Sensor Sheet.1 Sheet.2 Sheet.3 Sheet.4 CN317 CN317 CN317 VCC-, GND-, RST, MD, A-, B- VCC- GND- RST MD A- B- VCC-GND-RSTMDA-B- Rotor with Motor Rotor with Motor Rotor with Motor Stator Stator Stator Vcc Opt2 LDO Vcc Opt2 LDO Vcc Opt2 LDO RS-422/RS-485 RS-422/RS-485 RS-422/RS-485 Sheet.22 Sheet.23 Sheet.24 Sheet.25 Sheet.26 Sheet.27 Sheet.28 Sheet.29 Sheet.30 Sheet.31 Sheet.32 Sheet.33 Sheet.34 Sheet.35 Sheet.36 Sheet.37 Sheet.38 Sheet.39 Sheet.40 Sheet.41 Sheet.42 Sheet.43 Sheet.47 Sheet.48 Sheet.49 Sheet.50 Sheet.51 Sheet.52 Sheet.53 Sheet.54 Sheet.55 Sheet.56 Sheet.57 Sheet.58 12V 12V 12V RS485/422 RS485/422 RS485/422 TX TX TX SinRX SinRX SinRX CosRX CosRX CosRX Sheet.65 Sheet.66 Sheet.67 TX TX TX SinRX SinRX SinRX CosRX CosRX CosRX Connector 1.156 Connector 1.156.73 5.0V 5.0V 5.0V Connector 1.156.75 Connector 1.156.76 SinP SinP SinP SinN SinN SinN CosP CosP CosP CosN CosN CosN SCLO, SDA0 SCLO, SDA0 SCLO, SDA0 SCL1, SDA1 SCL1, SDA1 SCL1, SDA1 SinP, SinN, CosP, CosN SinP, SinN, CosP, CosN SinP, SinN, CosP, CosN IRQ0 IRQ0 IRQ0 IRQ1 IRQ1 IRQ1 Label Text 10pt.262 Vcc Option 1 Vcc Option 1 5V/300mAmax 5V/300mAmax 5V/300mAmax UART UART UART 5/3.3V 5/3.3V 5/3.3V Sheet.94 System Control System Control System Control IRQ IRQ IRQ UART UART UART 12bit AD0/AD1 12bit AD0/AD1 12bit AD0/AD1 I2C0 I2C0 I2C0 I2C1 I2C1 I2C1 12bit AD2 12bit AD2 12bit AD2
Exiting Interactive Block Diagram