The iC-LSHC photosensor is a general purpose optoelectronic scanner made to suit a variety of encoding applications, such as rotary and linear encoders used for motion control, robotics, brushless DC motor commutation, power tools etc.
iC-LSHC features 12 monolithically integrated photosensors with active areas of 800 µm x 330 µm each. A high transimpedance gain of typically 1 M generates output signals of a few hundret Millivolts already from illumination levels of typ. 1.7 mW/cm2. In most cases no additional measures must be considered to filter for noise and interferences.
Sine/cosine encoders are the typical application for iC-LSHC. Its 3-track scanning features a set of 4 photosensors each per track, generating positive and negative going sine signals, as well as positive and negative going cosine signals. An excellent matching and common mode behavior of the differential signal paths is obtained by a paired amplifier design, reducing the needs for external signal calibration to an absolute minimum.
The spectral sensitivity range includes visible to near infrared light, with the maximum sensitivity being close to a wavelength of 680 nm. When using iCLSHC for encoder applications with typical disc and mask codes, a signal amplitude of approximately some 100 mV is typical under low light conditions, for instance when iC-LSHC is illuminated at only 3.0 mW/cm2 by an 740 nm LED.
Applications:
• Optical position encoding from analog sine/cosine signals
• Incremental encoders with interpolation
• Absolute position encoders using nonius scales
Symmetry Electronics (and its e-commerce division: SemiconductorStore.com) is an authorized iC-Haus distributor.
