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which soc is best suitable for low power

Bimal

Which has different best low power mode among other SoCs. Can anyone let us know the comparison of it?

  • whether to go for nRF51822 or nRF52832
  • 0

    Looking at the headline figures:

    The nRF51 draws ~10mA receiving and transmitting whilst the nRF52 draws ~5mA. The nRF52 has better Bluetooth receiver sensitivity. The nRF52 has a fast CPU, so will get its work done quicker and be able to go to sleep quicker(lower overall power).

    The nRF52 is newer, and has a swathe of errata, but generally more functionality than the nRF51. For both chips some of the issues may be hidden, so it may be that the peripheral block that you end up using has a corner case due to the way you use it.

    Longer term I suspect there will be a v2 of the nRF52 as they fix the significant errata. Since this is a new product / better silicon process I would go with that one, but there are a lot of other considerations when picking a platform! e.g. nRF51 can be bought in a smaller package(WLCSP), has a higher throughput with the S110 driver, nRF52 has a PWM peripheral and requires fewer off chip components as well as many other differences (price for instance?).

    If you intend on shipping next month, then you cannot rely on updates to SoftDevices or silicon, similarly there are a lot of module manufacturers out there for the nRF51, and probably fewer for the nRF52. If you expect it will be a year then you need to factor in how much hope you have for Nordic updating drivers/silicon, there appear to be chasing the standard pretty well to me :) and they have yet to hit v4.2 which I suspect they will at some point.

    Good luck,

    Peter

  • 0

    Hi

    Generally speaking about current consumption of nRF51 vs nRF52: Most peripherals of the nRF52 are about 2x as efficient as on the nRF51, i.e. the nRF52 peripherals draw generally ~50% of the current compared to the nRF51 peripherals. Sleep current of nRF52 is also about 50% compared to nRF51. The largest exception is the nRF52 CPU which is generally 4x-10x as sufficient as the nRF51 CPU.

  • 0 in reply to Stefan Birnir Sverrisson

    Hi

    I looked for the datasheet of nRF52832 but was not able to find it on website. Can you share me the datasheet of nRF52832.

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