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ADS1282-SP: unused pins

Steve Widener
Genius 9595 points
Part Number: ADS1282-SP

Do you have any guidance for what to do with unused analog inputs for the ADS1282-SP? Is there a termination/protection scheme that you would recommend?

  • 0
    TI__Genius 14540 points

    Hi Steve,

    Page 17 of the datasheet states the following:

    The specified input operating range of the PGA is shown in Equation 2:

    AVSS + 0.7 V < (AINN or AINP) < AVDD – 1.25 V (2)


    Absolute input levels (input signal level and common-mode level) should be maintained within these limits for
    best operation.

    So long as the unused input meets the bias condition of equation 2, the circuit will be OK.

    Thanks,

    Christian