Encoder for industrial and commercial equipment

The AEDR-850x series is claimed to be the market's smallest three-channel reflective encoder.

It features built-in interpolation for high-resolution measurement that is suitable for applications including card readers, insulin pumps and other types of industrial, consumer and medical equipment.

A standard reflective encoder module contains two digital output channels for direction sensing, with another module required for indexing purposes.

For motion-feedback applications requiring high-resolution measurement, an external interpolation device had previously been necessary.

The Avago AEDR-850x reflective encoders integrate an LED light source, photo-detecting and interpolator circuitry, and the three channels in a single package with a 3.95 x 3.40mm footprint.

With high-resolution encoding of 304 lines per inch (12 lines per millimetre), the compact modules are said to enable a new level of miniaturisation for applications where size and space are primary concerns.

The AEDR-850x encoders offer interpolation of up to 4x and enable various resolution designs by changing the code-wheel size.

The optical-based modules are less susceptible to EMI compared with Hall-effect devices.

With an absolute operating temperature range of -20C to +85C, the rugged encoders are suitable for commercial and industrial operation environments.