Miniature optical encoders offer high resolution

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Avago Technologies is expanding its series of miniature reflective incremental optical encoders - which are currently claimed to be the smallest in the industry - with a new high-resolution model. With dimensions of 3mm long by 3.28mm wide by 1.26mm high, Avago's AEDR-8400-14x reflective surface-mount optical encoders are robust and can operate over a wide temperature range, making them an excellent choice for use in a variety of industrial automation and office applications.

The AEDR-8400-14x series high-resolution optical encoders provide up to 318 lines per inch (LPI) resolution, have two-channel quadrature digital output for directional sensing, and are transistor-transistor logic (TTL) compatible. They also incorporate an LED light source and photo detector IC in a single leadless package, and use reflective technology to sense rotary or linear position. Moreover, the AEDR-8400-14x encoder can be interfaced directly with most signal processing circuitries to provide design-in flexibility and easy integration into existing systems. The AEDR-8400 series encoders are an excellent choice for miniature motor applications, housed encoders, digital still cameras, scanners, printers, and a wide range of applications where space is limited.

Avago's AEDR-8400 series reflective encoders provide accurate real-time position sensing that is said to be superior to competing encoders in terms of duty, state and phase. They are also insensitive to axial play and maintain performance and accuracy over a wide variation in the gap between sensor and code wheel or strip. The AEDR-8400 series can be used with a reflective code wheel to sense rotary position and velocity, or with a linear code strip to sense linear position and velocity.

With the addition of the AEDR-8400-14x encoder, Avago can now provide designers with a choice of two miniature reflective optical encoder options. The higher resolution AEDR-8400-14x offers up to 318 LPI while the AEDR-8400-13x offers up to 254 LPI.

Other features include:

  • Single 2.8V supply
  • Operating temperature range of -20 to +85degC
  • RoHS compliant

The AEDR-8400 series reflective optical encoders are available through Avago Technologies' direct sales channel and worldwide distribution partners.

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