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ADS8684 Unused pin

cafain
Mastermind 6755 points
Other Parts Discussed in Thread: ADS8684

ADS8684

Please tell us about the treatment of unused pins.

1) NC-pin (12,13,14,15) Do you need to Floating state?    or do I connect to GND?

2) When you do not use the AUX_IN pin (10), or you need to Floating state?

3) When you do not use the AIN_xP pin (18,21,23), or you need to Floating state?    or do I connect to GND?

4) When you do not use the AIN_xP pin (18,21,23) between AIN_xGNA (19,20,22) pin    do i need to connect a capacitor (for example 1uF).

Best regards

  • 0
    TI__Guru 55466 points

    Hello Cafain,

    Pins 12, 13, 14 ,15 have no internal connection to the ADS8684.  these pins can be left foating or you may connect to AGND as indicated on datasheet (p4).

    When not using Aux pin (10), you may connect to AGND.  Same recommendation on pins 18,21,23.   If the pins are not in used, you may connect them to AGND and in this case, the decoupling capacitor is not required.

    Regards,

    Luis