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MSP432P4111: Is the ADC 16 bits or only 14?

Rob Frohne
Expert 1505 points

Part Number: MSP432P4111

Hi,

I was very interested when I started seeing advertising for the MSP432P4111 that bragged about a 16 bit ADC, two bits better than the MSP432P401.  I almost bought an EXP-MSP432P4111 Launchpad to try it out, but before doing that, I went and read the data sheet carefully.  It says 14 bits, and I see no difference between the P401 and P4111 regarding ENOB or number of bits.  However, the other contradictory advertising still abounds, and makes me excited everytime I see it.  I suspect the data sheet is correct, but wanted to verify that, on the off chance it is not.  Perhaps someone at TI can arrange to correct the inconsistency too.  The places I saw 16 bit ads include the TI app, the EXP-MSP432 Launchpad advertising, and I think somewhere else.

Thanks,

Rob

  • 0
    TI__Guru 64491 points

    Rob,

       Thank you for the feedback.  You are correct that the ADC for the P401 and the P4111 are the same.  The 16-bit statement is an attempt to highlight the performance of the ADC, and specifically the case when oversampling is used an ENOB of over 15 bits can be achieved.  A more detailed discussion can be found here:  .

    Here are the output formats that are available for the precision ADC peripheral are found below.  Please note that in the DF=1 case the data is presented in a 16-bit format with the two LSBs = 0.

    Regards,

    Chris

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