ADUM6028-5BRIZ no output voltage

Hello,

I am currently using the ADuM6028-5BRIZ and there seems to be an issue with the output voltage.
I tested several of my prototype PCBs, but it just doesn't work.

I connected the chip just like the datasheet says:
Pin PDIS connected to GND.
Vdd is 5V.
VSEL is connected to the V_iso pin.

Anyone else got this problem?

Does the chip have some kind of failstate, or overcurrent state, in which the output voltage is shut off?

Thanks!

Best regards

Max



changed carriage returns
[edited by: MDoerrmann at 9:10 AM (GMT 0) on 17 Jul 2019]
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  • 0
    •  Analog Employees 
    on Jul 17, 2019 6:38 PM

    Max: I'm not sure what the problem is, the ADuM6028 should start up and give you a 5V VISO voltage when VSEL is connected to the V_iso pin, using the circuit from the datasheet.  Can you send me your schematic and layout of the ADum6028 circuit?  A scope waveform of the VDDP and VISO pins in startup would help too.

    Regards, Brian

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  • 0
    •  Analog Employees 
    on Jul 17, 2019 6:38 PM

    Max: I'm not sure what the problem is, the ADuM6028 should start up and give you a 5V VISO voltage when VSEL is connected to the V_iso pin, using the circuit from the datasheet.  Can you send me your schematic and layout of the ADum6028 circuit?  A scope waveform of the VDDP and VISO pins in startup would help too.

    Regards, Brian

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