iC-LNG 16-BIT OPTO ENCODER
WITH SPI AND SERIAL / PARALLEL OUTPUTS
Rev A1, Page 2/25
DESCRIPTION
iC-LNG is an optoelectronic encoder IC for absolute PSIN, NSIN, PCOS, and NCOS and are used by the
linear and angle measuring systems, such as glass integrated 6-bit interpolator.
scales and encoders. Photodiodes, amplifiers, and
comparators, the entire signal conditioning unit, and iC-LNG synchronizes the interpolator and singleturn
interfaces for position data output have been mono- data to form a contiguous Gray-coded position data
lithically integrated into the device.
word. A shift register or SPI interface are available
for position data output. iC-LNG also outputs incre-
An integrated LED current control with a driver stage mental A/B/Z signals, the resolution of which can be
allows a transmitting LED to be directly connected programmed.
(e.g. iC-SN85). The optical receive power is kept
constant by the control unit, regardless of tempera- After startup iC-LNG is configured using the SPI in-
ture and aging effects. The receive power setpoint terface. To make connection to a 3.3 V microcon-
can be programmed. Should the LED current control troller easier, all digital I/O ports, including the SPI,
exit its operating range, this is indicated at the error can be run on 3.3 V.
message output (end-of-life alarm at pin ERR).
Test currents can be applied to test pins TPS, TNS,
The photocurrent offset and photocurrent amplitude TPC, and TNC to simulate photocurrents. Allocation
of the analog sine/cosine signals can be calibrated. to various tracks can be selected as required, en-
These calibrated voltage signals are lead out to pins abling a full function test of the IC with the exception
of the sensors.
ICHAUS [ IC-HAUS GMBH ]
