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Optoencoder touts small 7 x 8mm board space

Posted: 21 Oct 2011 ?? ?Print Version ?Bookmark and Share

Keywords:optoencoder? optoelectronic scanner? measuring system?

iC-Haus GmbH has rolled out a multichannel, optoelectronic scanner geared for the capture of absolute position data for linear displacement measuring systems or rotary encoders. The iC-LNG boasts its exceptionally small design that is achieved by combined scanning of a 10bit Gray code in addition to an analog signal track. This is evaluated using real-time interpolation that extends the position value to 16bits, said the company.

iC-LNG's sensor array requires a code width of just 5.4mm, enabling smaller code discs or larger hollow shaft diameters to be used. The LED lighting unit is also much more compact, added iC-Haus. The optoencoder provides a suitable light source with a particularly energy-efficient LED. iC-LNG controls the level of illumination and acts as a monitor while a separate alarm output indicates any lighting errors.

Offset and amplitude compenzation has been integrated for the correction of the analog track signals that are also output as differential sine and cosine signals through four ports. The interpolation error can be reduced by signal correction to gain more precise position data. This setting is also beneficial to the incremental signals that are also provided. iC-LNG supplies A/B/Z signals with 1,064 to 16,384 pulses in selectable binary grades.


iC-LNG can deliver clock rates up to 16MHz for

The position data can be output in parallel (up to 14bits) or in series using a fast shift register. Clock rates of up to 16MHz are possible for cycle times of less than one microsecond. Alternatively, the 3.3V-compatible SPI interface can be used that was implemented for the configuration of the device. iC-LNG operates from 4-5.5V within an operating temperature range of -40C to 110C. All functions are available up to a maximum speed of 12,000rpm. The device comes in a 30-pin optoBGA package with a pre-assembled reticle and requires about 7 x 8mm of board space.

iC-LNG supplements the iC-Haus portfolio of absolute optoencoders with its medium resolution, complexity and simple operation using the SPI interface. LEDs, code discs, a demo board and a ready-to-operate MCU board that can be connected up to a PC are available for evaluation.

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