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ADS6125: Power supply

Part Number: ADS6125

Is it possible that the AVDD and the DRVDD share a power supply? 

  • Hi,

    it is common to drive the analog and digital supplies from the same regulator as you show, but not directly without some filtering to separate the supplies.   on the TI web page for the ADS6125EVM there is a downloadable zip file for the physical design package for the EVM.  In that file is a pdf of the schematics.  on page 6 of the schematics are shown the supply filtering for the analog and digital supplies consisting of a ferrite bead on the analog supply before going to the ADC and a ferrite bead on the digital supply before going to the ADC.  And then adequate bypass caps after the ferrites.  I would keep that filtering structure after your LDO. 

    Regards,

    Richard P.

  • Thanks for your support. I'll integrated filters.