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LDC0851: Max sinking current of output?

Brian Gustafson
Prodigy 35 points
Part Number: LDC0851

Just a quick question on a design.  I was getting .97V across R1 and reading .416V at p5 of S3 (while LOW).  Due to space constraints we couldn't use a transistor to switch on the LED, but I didn't think 4.4mA was too much for the device when it said the Absolute Maximum was 5mA. I didn't see a value explicitly listed in the datasheet for output sinking current specifically.

Did we push this too hard?

Thanks!

  • +1
    TI__Mastermind 40295 points

    Brian,

    You are right, the data sheet doesn't give a recommended value other than the ABSMAX.
    The only other reference I could find is  in section 7.6 where it gives VOH and VOL for 1mA of current.

    The 4.4mA of current sounds uncomfortably close to the 5mA max, but we don't have any solid evidence that it will be a problem.

    Regards,
    John