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ADS1248 Termination of unused AIN6,7-pin

masahiko shimizu
Guru 11235 points
Other Parts Discussed in Thread: ADS1248

Hi

My customer is using ADS1248 .
Could you let me know the termination of unused AIN6,7-pin?
Which of the AVDD connection or the AVSS connection or the open is best?

Thanks
Shimizu

  • 0
    TI__Guru* 98035 points

    Shimizu-san,

    The connection of unused analog input pins can slightly impact the leakage currents of the other channels. For the lowest leakage on the used pins, we recommend leaving the unused pins floating. If customers don't want to leave inputs unconnected, the next best option is to connect them to AVDD. ,If there is a risk of ESD or EMI pickup for an unconnected analog inputs, then the inputs can be tied to AVDD through a pullup resistor.

    Joseph Wu

  • 0 in reply to Joseph Wu
    Guru 11235 points
    Hi Wu-san

    Thank you for your support.
    I understood.

    Thanks
    Shimizu