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lutzek's avatar
lutzek
Icon for Occasional Contributor rankOccasional Contributor
1 year ago
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10MxxDAF484 Different voltage on VCCIO1A/B and VREF_ADC pin

Hello, I am using dual supply device with ADC (10M50DAF484I7G). In my design I initially connected ADC_VREF pin to 2.5V and VCCIO1A/VCCIO1B (so also JTAG connector) to 3.3V. I'm not sure if this is ...
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  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    1 year ago

    If you do not enable the ADC feature, you may connect VCCIO1A and VCCIO1B pins to different voltage levels, provided that the VREF pin is not used. If the VREF pin is used, you must connect the VCCIO1A and VCCIO1B pins to the same voltage level.


    If you enable the ADC feature, connect VCCIO1A and VCCIO1B to 2.5V.


    This is what I got from Pin Connection Guidelines for Max 10 (Dual Supply).

    It checks all your recommended solutions.


    Regards,

    Aqid


AqidAyman_Altera's avatar
AqidAyman_Altera
Icon for Regular Contributor rankRegular Contributor
1 year ago

If you do not enable the ADC feature, you may connect VCCIO1A and VCCIO1B pins to different voltage levels, provided that the VREF pin is not used. If the VREF pin is used, you must connect the VCCIO1A and VCCIO1B pins to the same voltage level.


If you enable the ADC feature, connect VCCIO1A and VCCIO1B to 2.5V.


This is what I got from Pin Connection Guidelines for Max 10 (Dual Supply).

It checks all your recommended solutions.


Regards,

Aqid