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DS10BR150 - minimum valid differential input

Mark Tillmann
Prodigy 110 points
Other Parts Discussed in Thread: DS10BR150

I am an in-circuit Test Engineer and I have several DS10BR150's on a new test development.  Typically when testing LVDS transmitters, I drive the input digitally and make a DC voltage measurement at the output.  The reason I don't use differential digital receivers to test the output is that the digital receivers are referenced to board ground.  Since the Vcm has a range of 1.05 to 1.375, I wouldn't reliably be able to digitally measure the output.  The input of the driver is tied to a transformer coil.  If I do apply a differential voltage, it will need to be minimal due to current draw.  It's hard to discern from the datasheet what the minimum allowable differential input is.  Any help would be greatly appreciated.

Thanks!

Mark

  • 0
    TI__Mastermind 43795 points

    Hi Mark,

    The typical threshold measured in characterization was approximately -10mV for a negative going signal and 10mV for a positive going signal.  Across voltage, temperature, and input common mode the thresholds were in the range of +32mV to -20mV. 

    This is definately lower than the datasheet which is based on the LVDS standard specifications.

    Regards,

    Lee