• ADuM6402 VDDL input pin connection

    ADuM5402 has been replaced with ADuM6402 on PCB (due to component
    availability). However, some parts work but others don't. Datasheet says VDDL
    pin on ADuM6402 must be connected. What happens if this pin is left open (as in
    case of ADuM5402…

  • ADuM6402 reinforced


    Our customer needs reinforced insulation with ADuM6402.

    They prefer to use Single Overlap Stitching Capacitor.

    Is this OK for reinforced insulation?


  • ADuM6402 Question

    Hello Thank you for your support always.

    Our customer who is considering ADuM6402 has question about AN-0971.

    There is a comment as below.

    The rectifier circuit on the secondary side effectively doubles this frequency during the rectification process…

  • ADuM6402 180MHz immunity


    Thanks to your advice, the 360MHz EMI was improved 20dB.

    But the result of 180MHz EMI was not good compared with the expectation.

    They took a measure as below,

    change from 2-layer to 4 layer

    Edge guard

    stitching capacitor: 30pF

    Safety cap…

  • digital I/O in ADuM6402


    My customer uses only 2 (1-1) ports though ADuM6402 has 2-2.

    How to treat the pins which are not used.

    Can they connect GND?

  • RE: ADuM6402 don't restart correct

    Hi Bookevq

    My records indicate that these issues were fixed in material newer than date code 1209.  If you are having restart issues with material after that date code, please return the material for evaluation through your local distributor.  Please note…

  • ADuM6401 and common mode transient immunity

    On my measurement board there are some analog inputs that should be galvanic
    insulated from the rest of the board. So I want to use the ADUM6402. A
    requirement for our design is that it can handle a surge pulse (common mode,
    line - earth) with…

  • RE: ADUM6402CRWZ regulation and noise issues

    There are no other significant differences between the ADuM5402 and ADuM6402 other than the VDDL pin that would produce the operation as described, it does appear to be sensitive to some other system related line or load sequencing event. Please feel…

  • RE: high dc voltage isolation

    Dont know? which will have the best results? I dont have a schematic or block yet.The layout is up to me.  Its pretty straightforward though, I just need to withstand a 1500vDC working voltage continuously.  The board will be FR-04. I would like an isolator…