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smartrf05bb slightly high current consumption

Guru 16250 points

Hi,

I'm attaching a cc2541em to a battery-powered smartrf05bb.

There is no jumper on the board present. EM selection switch is in SOC/TRX position.

I attach my Ammeter to P7 and switch on the board.

However, in sleep mode I do not obtain 1 uA. In fact, I see 0.2mA.

Instead, if moving EM selection switch to MSP position, I obtain 0.08mA. Just being curious why this happens. Datasheet says it should by SOC/TRX.

By removing the cc2451em from the battery board and powering in other manners, I obtain the desired value in the Ammeter.

My goal is obviously to see my 1uA while the node is powered by smartRF05BB! :)

So, I'm omitting something, please let me know your thoughts!

 


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  • Hi Kazola,

    In case no one answered this question yet.

    I think that the excessive power consumption you'r measuring is drawn from the on-board SPI flash (25PE20VP),

    which is not properly configured. Refer to swru209b Appendix A.4 (last page in schematic section) for pinout.

    You may also solder it out just to prove a point.

    Br,
    Igor.

    Thank you for marking the thread as answered if your question was answered :)

  • Guru 16250 points

    In reply to Igor Sherer:

    Thanks Igor! I will give it a try.

     


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