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Reflective optical encoders offer high resolution

Posted: 08 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:reflective optical encoders? miniature optical encoders? high-resolution encoder?

AEDR-8400-14x reflective optical encoders from Avago

Avago Technologies has announced the expansion of its series of miniature reflective incremental optical encoders, said to be the smallest in the industry, with a new high-resolution encoder.

With dimensions of 3-by-3.28-by-1.26mm (LxWxH), the new AEDR-8400-14x reflective surface mount optical encoders are robust and can operate over a wide temperature range, making them a suitable choice for use in a variety of office and industrial automation applications.

The AEDR-8400-14x 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. These high-resolution optical encoders also incorporate a LED light source and photo detector IC in a single leadless package, and uses reflective technology to sense rotary or linear position.

Moreover, the new encoders can be interfaced directly with most signal processing circuitries to provide design-in flexibility and easy integration into existing systems. They are especially suitable for use in miniature motor applications, housed encoders, digital still cameras, scanners, printers and a wide range of office and industrial automation applications where space is limited.

The new devices promise accurate real-time position sensing that's superior to competing encoders in terms of duty, state and phase, the company said. 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 devices 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.

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