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ISO7041: Temperature profile

Groman
Prodigy 30 points

Part Number: ISO7041

Hi,

I need more informations about the temperature profile of the ISO7041.

What is its consumption behaviour according the temperature? Is it possible to have curves or something else which enable me to establish the consumption (supply current) of the product?

Because i'm not sure of my reasoning, can you confirm it?

Configuration: 3,3V supply, INA is a DC signal, Refresh disable. INB,C,D are fix to GND.

Can i said the consuption total  (typ) = Icc1+Icc2 + IinA,B,C,D

Itotal= 5,1+8,9+(3,5*4) =28µA ? I have some doubts about my datasheet comprehension.

Thank you

  • 0
    TI__Guru 55925 points

    Hi Groman,

    Welcome to TI E2E Forum!

    Unfortunately, I do not have current consumption vs temperature curve for ISO7041. I will check with my colleagues if we have this data available.

    The typical current consumption values are usually captured at an ambient temperature of 25C while the max number is usually at the max temperature. This does include many other dependencies but it is good approximation to assume typical value for 25C and max value for 125C.

    The per channel current specified in datasheet for refresh disabled condition is obtained by finding out the total device current and then divide it by total number of channels. The per channel current is provided only for analysis and comparison.

    In your application, the total current Itotal should equal to 3.5µA*4 = 14µA (typical). Thanks.

    Regards,

    Koteshwar Rao

  • 0 in reply to Koteshwar Rao
    Prodigy 30 points

    Hi Koteshwar Rao,

    Thank you for your quick reply.

    Because we work in the range of the µA, I would not be surprised to see the consumption change according to the temperature. But ok I will continue to work with this approximation at +25°C.

    Thank you for the explanation, i correct my mistake ! 

    Regards,

    Groman