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MSP430F47186: A/D Speed

Daniel Tardiff
Prodigy 10 points
Part Number: MSP430F47186

What is the maximum Data Rate (16-Bit) in KHz per A/D Channel when all 6 channels are used?

Also for 2 Channels & 3 Channels.

Vcc = 3.3 VDC;  Mclk = 16 Mhz; fSD16 = 1 Mhz.

  • 0
    TI__Mastermind 26420 points

    Hello Daniel,

    The MSP430F47186 has six independent sigma-delta ADCs (referred to as channels) that can all simultaneously sample using "group of channels, single conversion" mode.  So, the number of channels isn't really a gating for sample rate.  You can sample 2, 3, or 6 channels all at the same rate.  

    The sample rate = modulator's frequency / Over sampling rate.  So Fs = Fm/OSR.  In this case, your Fm = 1Mhz.    For all practical purposes, I believe OSR = 32 is the lowest you can go, so max Fs = 1Mhz / 32 = 31.25 ksps

    Hope this helps,

    JD

  • 0 in reply to JD Crutchfield
    Prodigy 10 points

    Hi JD,

    Perfect !  I'm now ready to design-in the part.

    Thanks for your answer,

    Dan

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