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ADS1282: ADS1282 maximum input current under OV condition.

Ian
Prodigy 20 points
Part Number: ADS1282

Tool/software:

Dear TI team,

I have a question regarding the overvoltage (ESD) protection circuitry on the analog inputs of the ADS1282 ADC. In the Absolute Maximum Ratings section, it is stated that the maximum continuous input current is 10 mA. Does this refer to the maximum current each clamping diode on the analog inputs can safely handle? Would it be safe to apply a voltage higher than AVDD + 0.3 V (for example, 6 V), as long as the input current to the analog pins is limited to a value well below 10 mA (e.g., 100 µA)?

Thank you in advance.

  • 0
    TI__Guru 52376 points

    Hi Ian,

    Of course we can never advise that you exceed the absolute maximum ratings, nor even operate at them. If you violate the absolute maximum ratings you do so at your own risk

    TI's recommendation is to ensure that the voltages / currents applied to the ADC remain with the recommended operating conditions, and that sufficient protection circuitry is added to absorb any voltages / currents beyond the absolute maximum. The ESD components on the ADC pins are meant as a last resort

    I can say that typically the overcurrent condition is more damaging to the ADC than the overvoltage condition, but this is not a recommendation to exceed the absolute maximum ratings under any circumstances

    -Bryan