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ADS8330: Best way to power +VA?

Henry Chan
Prodigy 40 points
Part Number: ADS8330

I'm curious what the exact purpose of +VA is, like, what is it powering? 

Does it need to be a low ripple source? 
If yes, can I just power it from my voltage reference or is that a stupid thing to do? 

The voltage reference I'm using is the REF5040AIDR which is rated for 10mA output. This ADC is the only thing using that ref. 

  • 0
    TI__Mastermind 22950 points

    Hi Henry,

    I see that you have duplicate posts open. I will go ahead and respond to this one and close the other. 

    +VA is the analog supply so this will power all internal analog blocks. Typically, for higher performance devices (>16bits) we recommend that the device have a dedicated reference supply. +VA should also be a very clean supply and we typically use Low Dropout Regulators (LDOs) for the supplies. 

    Regards,

    Aaron Estrada