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MSP430 Family and 14bit ADC

Efstratios Petrou
Prodigy 140 points

Hallo all,

which microcontroller of the MSP430 family supports 14-bit (or 12+2) analog-to-digital conversion???

Thanks in advance for your answer!

  • 0
    TI__Guru 56650 points

    Hi,

    you can use the MSP430 product search page to find the device you need:

    http://www.ti.com/lsds/ti/microcontroller/16-bit_msp430/product_search.page

    you can filter out by using the ADC parameter. There is no MSP430 has 14 bit ADC, but there are devices which has 16 bit (or more) ADC.

  • 0
    Guru 227245 points

    Efstratios Petrou said:
    which microcontroller of the MSP430 family supports 14-bit (or 12+2) analog-to-digital conversion???

    None.

    The maximum SAR ADC resolution is 12 bit with up to 200ksps, the Sigma-Delta converters have 16 or even 24 bit but are only for low frequencies (few ksps with maximum resolution).

    You can expand the 12 bit to 14 bit resolution by doing 16x oversampling and superimposing a sine wave of proper frequency and amplitude (=1LSB) to the signal. If you do 16 samples during one sine wave (exactly), it will average out the sine wave, but the signal itself will be lifted over the resolution threshold at different samples and therefore expand the resolution by 2 bits. Just doing 16 samples on the original signal will only apply an average but not increase resolution.

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