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ADC32RF45: Digital Down Converter DDC Datasheet Example numbers

James Chen26
Prodigy 65 points

Part Number: ADC32RF45

Hi,

On page 35 of the datasheet of ADC32RF45, I see the below illustration for the Dual-band Example (Figure 76). If the ADC output is IQ 3GSPS, after passing through the filter and divide-by-8 decimation, shouldn't the IQ output be 375 MSPS? is 750 MSPS a typo, or can someone explain why that's the case? 

Thanks

  • 0
    TI__Mastermind 29220 points

    Hi,

    Yes, that is a typo.  That should have been 375Msps for each of the I and Q samples.   It is in the queue of things to fix for the next revision of the datasheet.  I suppose we could say that the total sample rate of the I and Q together would be 750Msps but that would not be a clear as saying 375Msps for each of I and Q.

    Regards,

    Richard P.