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Best component selection for low power motes

Kelly Lee
Prodigy 20 points
Other Parts Discussed in Thread: CC2510, CC2530

I am trying to select the best micro-processor/RF transceiver for a wireless sensor application. I think the CC2510 is the closest to what I need, but I would like to hear what others have to say.

The rough specifications are as follows:

Min. Baud rate   125kbps,  A/D 12 bits,  Operating temperature ≈100 °C,  Supply 3 V,  Transmit current ≈12ma,  Sleep current ≈0.7µA,  Active Mode ≈300µA,  Off Mode (RAM retention) ≈0.1µA,  Number of Motes 256+,  Wake-up Receive is highly desirable,  RF  1 to 2.4GHz,  Package area 10x10mm max.

Low power is very important since an energy harvester is used to supply power to the motes. I know that the transmit mode for the CC2510 is 17mA, but I am willing to accept this if the overall system power is low and the board area is small. Is there a better choice than the CC2510?

  • 0
    TI__Expert 6825 points

    Hi Kelly,

    Given your temp spec (100C) I would recommend you to have a look at the CC2530. It is spec'ed up tp 125C.

     

    -Per

  • 0
    TI__Genius 10955 points

    Hi Kelly,

    Please note that while CC2530 is close to meeting your requirements at room temperature, the current consumption, especially in sleep mode, will be a lot higher at 100 °C.  If the current numbers you state are needed at that temperature, I am afraid that none of our LPRF SoCs can meet your needs. I believe this will be the case for any silicon chip, as the leakage will increase a lot with temperature.

  • 0 in reply to Per H
    Prodigy 20 points

    Richard,

    Thanks a lot. The CC2530 seems to be the best answer. Another reply mentioned that the power consumption will be considerably higher at 100°C. That is just something I will have to deal with. Fortunately, it is relatively easy to squeeze more power out of the energy harvester in this case.

    Kelly

  • 0 in reply to Kelly Lee
    Expert 1240 points

    This is a little off subject, but may I ask what method of energy harvesting you are going to be using?

    sparkchaser