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Original question:

TLC2543: TLC2543 Errors (INL, DNL, Offset, Gain, Total)

TLC2543: Leakage current

nico2
Intellectual 290 points
Part Number: TLC2543

Hello,

the leakage current of the TLC2543 is announced in the datasheet between -10µA and +10µA. Do you know if this dispersion between components is a random drift which follow a gaussian law ? If yes do you know the standard deviation of this variation ?

Best regards,

Nicolas Divel

  • 0
    TI__Guru* 93035 points
    Nicolas,


    I don't know any characterization data for the leakage current. However, I would only treat the value as only the minimum and maximum of the specification. I would not try to relate the specification to what the device to what the actual leakage current is.

    The actual leakage current may have several different sources. It is possible that it has an average value with a Gaussian distribution and a well-behaved standard deviation. However, it is far more likely that is NOT the case. In many ADCs I've seen, leakage currents come from the saturation currents of reverse-biased diodes that are used for ESD protection in the device. This leakage current may start out small, but has an exponential rise with temperature. It is also possible that the leakage current varies with input.

    At this point, all I can say is that the leakage current has a min/max spec of ±10uA as it is listed in the datasheet.


    Joseph Wu