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ADS8678: Common mode range

Francesco Ricci
Intellectual 350 points

Part Number: ADS8678

Hello,

The ADS8678 datasheet specifies that "The PGA also adjusts the common-mode level of the input signal before being fed into the ADC to ensure maximum usage of the ADC input dynamic range.". However I do not see the maximum common mode range that the PGA can handle. Can you give this information?

Thank you

Francesco

  • 0
    TI__Guru 50635 points

    Hello Francesco,

    Thanks for your query on E2E forum.

    ADS8678 is a single-ended input ADC and can not accept any differential signal, please refer to AIN_nGND range in below table from datasheet.The internal Programmable Gain Amplifier(PGA) converts high voltage single-ended input signal into a fully differential signal by attenuation and level shift to meet the requirement of  internal ADC's input dynamic range. I hope this is helpful to you, thanks.

    Best regards

    Dale

  • 0 in reply to Dale Li
    Intellectual 350 points

    Hello Dale,

    Thank you for pointing out that it is a single-ended input ADC. I was about to do a stupid mistake!

    Regards,

    Francesco

  • 0 in reply to Francesco Ricci
    TI__Guru 50635 points

    Hi Francesco,

    It's not a problem. Please let us know if you need any further support. Thanks for choosing TI ADCs.

    Best regards

    Dale