A multi-channel, optoelectronic scanner from iC Haus is specifically designed to capture absolute position date for linear displacement measuring systems or rotary encoders. The iC-LNG's extremely small design is achieved by combined scanning of a 10bit gray code in addition to an analogue signal track which is evaluated using real-time interpolation and which extends the position value to 16bit. The 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 compact. The IC controls the level of illumination and acts as a monitor; a separate alarm output indicates any lighting errors. Offset and amplitude compensation corrects the analogue track signals which are also output as differential sine and cosine signals through four ports. The interpolation error can be reduced by signal correction.
