IC-LSHC_17 Datasheet, PDF (2/9 Pages) IC-Haus GmbH – 3-CHANNEL SIN/COS PHOTOSENSOR ARRAY

iC-LSHC
3-CHANNEL SIN/COS PHOTOSENSOR ARRAY
Rev D1, Page 2/9
DESCRIPTION
The iC-LSHC photosensor is a general purpose opto-
electronic scanner made to suit a variety of encoding
applications, such as rotary and linear encoders used
for motion control, robotics, brushless DC motor com-
mutation, power tools etc.
iC-LSHC features 12 monolithically integrated photo-
sensors with active areas of 800 µm x 330 µm each. A
high transimpedance gain of typically 1 MΩ 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 pho-
tosensors each per track, generating positive and
negative going sine signals, as well as positive and
negative going cosine signals. An excellent match-
ing 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 iC-LSHC 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.
PACKAGING INFORMATION
PAD LAYOUT
PAD FUNCTIONS
No. Name Function
Refer to the description of pin functions.
Note: Dimension G4 is the reference
radius of the chip center.