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Using Laser Diode Driver IC (ADN2871) for different polarity  laser

Question asked by dbrunner on Sep 1, 2011
Latest reply on Jun 10, 2015 by nafran



I want to use an AD laser driver IC to control AC and DC current applied to the laser diode (VCSEL). All ICs I found are designed to control the cathode current of the laser diode.


The problem now is that I am working with an array of laser diodes, which has the cathodes of all the diodes wired to one pin, only the lasers anodes are individually addressable. I need to be able to control AC and DC currents for each individual laser!


Is there a way I can use, for example the ADN2871, to control the anode current of the laser by  inverting the ouput current - or something similar?


Thanks and kind regards,