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ADS1278: Can you confirm if I have correct LSB?

Charles Wolfe
Prodigy 40 points
Part Number: ADS1278

Tool/software:

From this table in the datasheet, if Vref is 2.5V, I calculated that the LSB should be 2.5 / (2^23 - 1) = 0.298 uV

Can anyone confirm if this is correct?

  • +1
    TI__Mastermind 43140 points

    Hello Charles,

    Yes, you are correct.  Each ideal code step, or LSB size is 0.298uV.  Note that in most cases, this is much lower than the noise floor, unless you do additional digital filtering on the data in your processor.

    Regards,
    Keith Nicholas
    Precision ADC Applications