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ADS1278-EP: Can I power the DVDD or IOVDD without powering the AVDD

Xiang Maverick
Intellectual 750 points
Part Number: ADS1278-EP

In a partial power on system. Can I power the DVDD or IOVDD without powering the AVDD? At that time I don not hope the ADC work， but I can turn on AVDD when it is needed.

  • +1
    TI__Mastermind 46760 points

    Hello Xiang,

    This condition will not damage the ADC, but the ADC will not work correctly after all power supply voltages return to recommended operating range.  In this case, you need to assert /SYNC after all supply voltages have stabilized and /DRDY has asserted to properly reset the device.

    Also note that the analog and digital input pins should not be driven before all power supplies are fully powered-up.

    Regards,
    Keith Nicholas
    Precision ADC Applications