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Position sensor measures distance with 13.9kHz switching frequencies

Posted: 18 May 2012 ?? ?Print Version ?Bookmark and Share

Keywords:position sensor? LED driver?

iC-Haus GmbH has debuted the iC-LO triangulation position sensor for the assembly of diffuse reflective photoelectric sensors with switching outputs. The SoC includes photodiodes, LED driver, MCU interface, signal conditioning circuitry, and signal filter unit.

The 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 a microcontroller.

The iC-LO operates from 4.5V to 5.5V in an operating temperature range of -40C to +85C. The 15-pin optoBGA package can be used with SMDs and requires just approximately 4mm 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 are available from stock and production quantity can be ordered at $9.72 at 1,000 units.

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