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ADS1263: What will happen if the VCC to VSS equal 7V

Xu Junhua
Prodigy 90 points
Part Number: ADS1263
Other Parts Discussed in Thread: PGA281

Hi,

If the power is  7V, what will happen to the ADC.

For the input signal reach 7V, so if the power could be 7V, the design will be easy.

But I'm afraid  that the performance of AD will be sacrificed.

Thanks,

Junhua Xu

  • 0
    TI__Mastermind 44720 points

    Hi Junhua,

    According to the Absolute Maximum Ratings table, a supply voltage of 7V or higher could damage the device (see below):

     

    Therefore:

    • If you need to measure up to 7V on the analog inputs, then you'll to reduce the input voltage provided to the ADC by either using a resistor voltage divider OR by providing a higher voltage PGA (such as the PGA281) to attenuate the input signal.

    • If you don't need to measure the 7V, then you could protect the ADC with a TVS or other low-leakage diode and a series resistor to clamp the voltage and limit the input current to the device.

    I hope that helps! Let me know if you have any additional questions!

    Best Regards,
    Chris