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AWR1642BOOST: Current consumption unstable

Kondor
Intellectual 310 points
Part Number: AWR1642BOOST
Other Parts Discussed in Thread: AWR1642

Hi,

Today making some measurements by  AWR1642 EVM I saw a weird current consumption.

Basically supply the EVM with  5V,  current consumption looks like really  unstable moving continually  between 300mA and 400 mA more or less. (does not metter which AWR configuration I use i.e. 4RX 2TX or 1TX1RX and so on)

Assuming  appropriate decoupling capacitors on the EVM , did you never see something like that?

Even because since all the required supply are feeding  from 5V I expect more than just 450mA of current comsup.


Please keep in count that I don t have any problem of HW connection between  EVM and PC all is working fine using the mmWave Demo Visualizer.

BR,
Fabrizio

  • 0
    TI__Guru 58035 points

    Hello Fabrizio,

    The current consumption would be different during the chirping period , idle period and inter frame period (it being higher in the chirping period and lower in the inter frame period). Depending on the chirp profile and frame configuration used you would see the current accordingly. 

    Regards,

    Vivek

  • 0 in reply to Vivek Dham
    Intellectual 310 points
    Hello Vivek,

    Yes I really know that if I change the Radar configuration in term of frame rate or chirping period the current consumption would be different.

    The point is without modified at all the setup of the SoC the current start to be unstable apparently without any reason to be back stable only if I reboot the device.



    BR,
    Fabrizio
  • 0 in reply to Kondor
    TI__Guru 58035 points

    Hello Fabrizio,

    When the device starts the transmission of the chirp the current would keep varying as the device transitions through different states, like chirp period, idle period , inter frame period. So you would see the current changing , its not one static fixed current. If you actually put a current probe with a high enough bandwidth you will be able to see the dynamic current profile.

    Regards,

    Vivek