iC-PT 3313
6-CH. PHASED ARRAY OPTO ENCODER (33-1250)
Rev A7, Page 2/12
DESCRIPTION
iC-PT3313 is an optical sensor IC with integrated analog operation the amplified signal voltages are
photosensors whose signals are converted into volt- available at the outputs, easing setting-up operation
ages by low-noise transimpedance amplifiers. Pre- and optical alignment procedures.
cise voltage comparators with hysteresis are used to
generate the digital signals, supplied to the output Typical applications of iC-PT devices are incremental
pins via differential +/- 4 mA push-pull drivers.
and motor feedback encoders. To this end, device
version iC-PT3313 provides differential A/B tracks
The built-in LED current controller with its 40 mA and a differential index track, each consisting of mul-
driver stage permits a direct connection of the en- tiple photo sensors. The layout of the signal ampli-
coder LED. Regardless of aging or changes in tem- fiers is such that there is an excellent paired channel
perature the received optical power is kept constant. matching, eliminating the needs for signal calibration
An external resistor presets the photocurrent operat- in most cases.
ing point and thus the desired illumination level.
Additionally, three more signal tracks are provided (U,
Selection input SEL chooses for three different op- V and W), which can be used to provide motor com-
erating modes: regular A/B operation, A/B operation mutation information, for example with 120 degree
with 2-fold interpolation, or analog operation. With phase-shifted signals.
ICHAUS [ IC-HAUS GMBH ]
