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iC-Haus offers optical triangulation position sensor

01 Mar 2013

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iC-Haus has announced its iC-LO device—a triangulation position sensor designed as an SoC for the assembly of diffuse reflective photoelectric sensors with switching outputs. Due to the high integration of the functions that includes the photodiodes, LED driver, MCU interface, signal conditioning circuitry and signal filter unit, the overall system is extremely small. Besides the iC-LO, all that is needed to create a triangulation measurement setup are a transmitting LED and a low-cost MCU, indicated the company.

The specially designed optical array is divided into one near diode, 127 middle diodes and one far diode. Two AC amplifiers are integrated together with the optical array to enable high interference and ambient light suppression and a dynamic range of up to 100dB. Using a filter glass, an ambient light suppression of up to 100kLux can be obtained.

The number of averaged measurements can be set to digitally filter the signals with measurement rates of up to 13.9kHz. The integrated lowside LED driver generates transmitting pulse currents of up to 1.2A. An external laser diode driver can also be activated for laser triangulation. The pulse duration of the illumination signal can be set through the SPI interface.

Data is output through two antivalent switching outputs and an additional output for the weak received light alarm. Alternatively, the SPI interface implemented for the configuration of the device can be used to output sensor results and states to a field bus interface through an MCU.

iC-LO operates from 4.5-5.5V in an operating temperature range of -40°C to 85°C. The 15-pin optoBGA package can be used with SMDs and requires just approximately 4 x 9mm of board space. The design-in process is supported by ready-to-operate demo boards and software for evaluation with a PC.

Samples and evaluation boards are available from stock and can be ordered through local distributors.

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