iC-OG
8-BIT DIFFERENTIAL SCANNING OPTO ENCODER
Rev C1, Page 2/9
DESCRIPTION
The iC-OG device is an optoelectronic detector IC for linear and angle measuring systems, such as glass
scales or shaft encoders, for example. Photodiodes, amplifiers, comparators and TTL-compatible push-pull
output drivers are integrated monolithically. Each of the 8 tracks is evaluated differentially; there are also
analog outputs available from three of the special feature tracks.
The integrated LED current control with a driver stage enables a transmit diode with series resistor to be
directly connected and ensures a constant optical received power. The setpoint for the receive current is
adjusted using an external resistor. Should the LED current control deviate from its working range, this is
reported at the error message output.
Two test pins allow a full test of all functions to be carried out excluding the photodiodes.
All push-pull and analog outputs are protected against ESD and short-circuit damage. The error message
output NER is also protected against short-circuiting and can be used in bus systems due to its open-collector
output.
ICHAUS [ IC-HAUS GMBH ]
