The SMD-01A is a miniature, reflective optical encoder head that incorporates a LED and high-precision analog amplifier. It generates low-noise high-precision analog signals, due to the unique semiconductor process used to fabricate the CMOS amplifier, and achieves better-than-submicron high resolution, in combination with an interpolation circuit.

It reduces signal degradation caused by errors in mounting position to a minimum, greatly reducing the assembly process workload required for a high-precision encoder, and simultaneously supports the miniaturization and high accuracy requirements of customer’s products.



Block Diagram

Key Features

  • Miniature package: 14-pin HCOB (5.3 × 4.3 × 1.68mm)
  • High-precision A/B-phase analog outputs
  • Noise-resistant differential output support
  • Reduced effects due to variations in the relative position of the scale for simplified assembly processing
  • 5V or 3.3V supply voltage operation
  • Supply voltage range: 3.13 to 5.25V (SWV=H)
  • 4.75 to 5.25V (SWV=L or H)
  • Operating temperature range: -20 to +60°C


  • Assembly machines
  • Laser optical axis control
  • Measuring instruments
  • High-precision rotary and linear encoders
  • Stages
  • Actuators
  • Various miniature motors
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