Optical position sensor's 13.9kHz ambient light suppression21 May 2012
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 100 dB. Using a filter glass, an ambient light suppression of up to 100 kLux can be obtained.
Using the system, 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 1.2 A. 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 via a microcontroller.
iC-Haus' iC-LO operates from 4.5 V to 5.5 V 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 9 mm 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 per unit in 1,000pcs.
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