ADG3304 high current consumption if disabled.

Hello,

I made some current consumption measurements on ADG3304. If I disable the enable pin  and VCCA=1.8V and VCCY=3.0V in consumes over 10mA. Only setting VCCA to 0V is the only way to have an shutdown current with a few yA. I couldn't find any hint in the datasheet to that describes this behaviour. It even happens if VCCY is set high first(VCCY>VCAA). Is there any explenation for this behaviour?

Best regards

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  • Hi,

    Setting the enable pin low should reduce the power consumption from both VCCA and VCCY supplies. The behaviour you are seeing does not seem correct unless VCCA is greater than VCCY, which does not seem to be your case. Could you share a picture of the schematic?

    Is the current consumption measurement from VCCA, VCCY or both? What voltage level is the EN pin tied to?

    Yours sincerely,

    Igor Ono.

  • The problem is tht er set VCCY to 0V if we set ADG3304 in tree state.The current consumption measurement is for both. Enable pin is tied to 1.8V. But current consumption was even high if enable was set to GND (VCCY=3V and VCCA=1.8V).

  • Hi,

    Could you post an image of the schematic?

    Is there a pattern being driven on A or Y pins while the issue is happening?

    Is the unit fully operational when EN is HIGH? If not, it might be damaged. Can you test other units of the ADG3304?

    Yours sincerely,

    Igor Ono.

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