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Original question:

ADS1256: Best performance method for delta-sigma AD

ADS1256: ADS1256 16pin DVDD

Derek Zhong
Intellectual 470 points
Part Number: ADS1256

Dear TI brother,

This is Derek from Arrow.My key customer have a question below:

The input voltage of pin 16 (DVDD) of ADS1256.@SSOP28 is 1.8-3.6V. 

1. Can the pin input 4.6-4.8V work normally?

2. What are the specific risks of 6-4.8V power supply for long time?

3. I see DVDD pin specification should not exceed 3.6V+10%. If the DVDD pin works for a long time from 4.6V to 4.8V, how long will ADS1256 be damaged after running? Do you have tested?

Could you mail to me? My customer want to contact you for detail info. Thanks for your support.

  • 0
    TI__Mastermind 35141 points

    Hi Derek,

    You should never violate the absolute maximum ratings for any device for any period of time. As the datasheet states:

    "Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied"

    I do not have test data to share with you that explains specifically what happens if you apply a higher voltage to DVDD, nor how long it takes before something catastrophic happens. These conditions could vary widely depending on other factors in your system, so we just note the conditions that cause our device to fail.

    The important point here is that you should never violate the absolute maximum ratings for our products.

    -Bryan