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DS90C032 input common mode range?

JONATHAN GRAHAM98068
Prodigy 90 points

Other Parts Discussed in Thread: DS90C032

I've got a system with up to a 1V ground differential between two sections and I'd like to use LVDS to cross that boundary.  The DS90C032 datasheet does not mention what it's input common mode range is, does anyone have any data on that?  Powered from 5V, I'm expecting that it may see Vcm of between 0.20V to 2.20V, will this work?

Thanks in advance! 

  • 0
    TI__Expert 4400 points

    Jonathan,

    This will work, and LVDS is perfect for this application.  The DS90C032 supports LVDS inputs.  The Recommended Operating Conditions section in the datasheet shows the recommended receiver input voltage range of GND to 2.4V (per the ANSI/TIA/EIA-644 LVDS standard).  If you keep the input voltage to the DS90C032 within this range then you will be fine.

    LVDS receivers can tolerate a minimum of +/-1V ground shift between the driver's ground and the receiver's ground.  LVDS has a typical driver offset voltage of 1.2V, so the common mode range of the receiver is typically 0.2V to 2.2V (with a recommended receiver input voltage range from ground to 2.4V).

    Gary Melchior

  • 0 in reply to Gary Melchior
    Prodigy 10 points

    Sounds great, thanks for the quick response!