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    BMA400 current draw during SPI communication

    cmorris
    New Poster

    BMA400 current draw during SPI communication

    Hello, 

    On our boards, we notice that communication with the BMA400 via MSP430FR5964 over the SPI is drawing more current than anticipated. For example, when we perform an 8 byte read of the XYZ accelerations at 100 times a second with the BMA400 in normal mode, the current draw is about 100uA on average; which is far more than anticipated. The spec for the BMA400 during normal mode operation is 14.5uA. Is there a spec for the BMA regarding current consumption during SPI communication? It's unclear if the BMA is drawing the current, or if it's a hardware artifact. Hoping for some clarity if anyone has any. Cheers 

    1 REPLY 1
    BSTRobin
    Community Moderator

    Re: BMA400 current draw during SPI communication

    Hi cmorris,

    Could we know your schematic first?

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