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  • Resolved

TSC2004: Sense Voltage set to less than I/O Voltage

Part Number: TSC2004

Hello team,

I am supporting an application using TSC2004 where a mistake was made, note (1) on the bottom of Page 3 of the TSC2004 Datasheet (Rev. E) that says that “I/OVDD must be ≤ SNSVDD” was overlooked and the Sense Voltage (SNSVDD) was tied to 1.8 V, and the I/O Voltage (I/OVDD) to 3.3 V.

However, the Absolute Maximum Ratings are not being violated, and the part seems to be working fine in prototypes.

Could you please let us know what the implications are in this case? what would you advise in this case?

Best Regards,
Victor S.
 Check my Recommended TI Resources

  • Hello Victor,

    I'll be responding soon with further information.

    Best Regards
    Jose Luis Figueroa
    Application Engineer
  • Hi Victor

    It is always recommended to follow the given guidelines in the datasheet, if you don't follow them we don't guarantee optimal performance.
    In fact, it is recommended to connect I/OVDD, SNSVDD and Vref to the same power supply.

    Best Regards
    Jose Luis Figueroa
    Application Engineer
  • In reply to José Luis:

    Hi Jose Luis,

    Could you please expand on the implications of this situation, in other words, we'd like to understand why is recommended that I/OVDD must be ≤ SNSVDD.

    Best Regards,
    Victor S.
     Check my Recommended TI Resources

  • In reply to Victor Salomon:

    Hi Victor,

    This condition could generate problems with the Power On Reset (POR). You can refer the following posts to find further information.
    e2e.ti.com/.../403463
    e2e.ti.com/.../34756

    Best Regards
    José Luis Figueroa
    Application Engineer

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