Reflective Encoder

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The AEDR-8400 series is the smallest optical encoder employing reflective technology for motion control purposes. The encoder combines an emitter and a detector in a single surface mount leadless package. When used with a codewheel or linear codestrip, the encoder translates rotary or linear motion into digital output.

The AEDR-8400 series outputs TTL compatible quadrature signals and as such, can be interfaced directly with most of the signal processing circuitries. Hence, the encoder provide great design-in flexibility and easy integration into existing systems.

The AEDR-8400 series provides motion sensing at a competitive cost, making it ideal for high volume applications. Its small size and surface mount package make it ideal for printers, copiers, card readers and many consumer products, particularly where space and weight are design constraint.


  • Reflective technology
  • Surface mount small outline leadless package
  • Two channel quadrature outputs for direction sensing
  • TTL compatible output
  • Single 2.8V supply
  • - 20ºC to 85ºC absolute operating temperature
  • Resolution: 12.5 lines/mm (318 lines/inch)


  • Mobile Phone
  • Digital Cameras
  • Video Cameras
  • Servo and Stepper Motor

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory Yes
RoHS6 Compliant Y
Motion Type Linear & Rotary
Operating Voltage (V) 2.8V
Optical Method Reflective
Output Type Digital
Product Size (mm) 3.00 W x 3.28 L x 1.26 H
Operating Temperature Range -20°C to +85°C
Units In Shipping Tube 1000.0
Resolution 318 LPI
Product Change Notice (PCN)2 i
Reliability Data Sheet1 i