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CD4051B: CD4051 datasheet :leakage numbers. Does TI have a lower leakage device?

ShreyasRao
Guru 62560 points
Part Number: CD4051B
Other Parts Discussed in Thread: MUX508, MUX36S08

Our customer are using CD405X for AI input MUX. The MAX leakage current for off status of this device is +-100na at 25 degree, and is  +-1000na at 85 degree. But there is a condition noted below the table “Determined by minimum feasible leakage measurement for automatic testing”. Customer 、  do not know what is the meaning of this sentence. Could you please help us to explain it? Another question is that the CD405x series analog switch do not show the on state leakage current. Do you have the data? IF yes, could you please share it with us?

  • 0
    TI__Mastermind 45605 points

    Shreyas,

    The CD4051B note in the datasheet “Determined by minimum feasible leakage measurement for automatic testing” is saying that the automatic test equipment used to verify datasheet parameters before devices are shipped to customers does have enough resolution to test this spec.  There are some older automatic testing equipment that lowest resolution can be as wide as 100nA. 

    Since this is an older device I do not think that the on state leakage current measurement is available. 

    What is critical in your system that you need this specified? 

    Thank you,

    Adam   

  • 0 in reply to Adam Torma
    TI__Intellectual 1520 points
    Hi Adam,

    Thanks for your information. Because this is limited by resolution old ATE, is it possible to provide a more accurate data ?

    Thanks again
  • 0 in reply to Vito Shen
    TI__Mastermind 45605 points

    Vito,

    It is possible for us to order the CD4051B device and measure the leakage on bench to get more accurate data but will come at the cost of time and resourcing.  When would you need this information?

    What is your application that you need a low leakage current specification?  We might have newer devices like the high performance MUX36S08 or low cost MUX508 which has both on-state and off-state leakage current specifications that could work in your application. 

    Thank you,

    Adam