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ADS5483: Continuously power down / on the ADC keeping active clock and references.

Prodigy 160 points

Replies: 3

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Part Number: ADS5483

Hi,

I would like to repeat the same question because I can't find the answer anymore and I would like to make the question more precise, expanding it too.

I have to define a schedule for the data flow from ADC. In a continuous repeated cycle of tens / hundreds of ms I need to acquire data only for a fraction of the cycle time (about 0.5 ms).

In this scenario the reference voltage and also the CLKM, CLKP, are always active.

In order to reduce the warming of the ADC, my idea could be to turn off the ADC for the fraction of the cycle time when the data is not collected.
Since all electronics should run continuously for years with only a few short shutdown periods every few days, two questions arise:
1) Is it safe to turn off the ADC (with the power-down pins) with the clock and reference active?
2) If the ADC is continuously powered down / on, can the reliability be affected by aging? I mean, do you have information on the maximum life cycle of the device in these operating conditions?

Thanks
Regards
Davide Badoni

  • Hi Davide,

    1). Yes, while in power down mode, the clocks and references can remain active.

    2). Unfortunately, I am not able to answer this question effectively. There are many factors that influence the life span of an IC (environment, age, overvoltage/current conditions, etc..), but I can't comment on whether bringing the ADC in and out of a power down state will shorten its lifespan.

    Best Regards,

    Dan

  • In reply to dBrock:

    Hi Dan,

    thank you.

    Only a last question. Are there any idea of the lifespan of this device in typical operating conditions?

    Thank you

    Davide Badoni

  • In reply to Davide Badoni:

    Hi Davide,

    My apologies for the delay. The lifespan of the IC has many factors, (such as temperature,humidity, power cycles, etc...) so I am not able to give a lifespan estimate. Anecdotally, you can consider the lifespan of a computer motherboard which can last for many years if kept in a cool, dry environment and is not subjected to power abnormalities.

    Best Regards,

    Dan

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