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

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

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.