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TLA2518: SPI correctly work when I touch the DVDD

Yawi Miki
Prodigy 140 points
Part Number: TLA2518

Hi,

I am using this chip as ADC. As mentioned in the datasheet, I have connected two 1uf on both DVDD and AVDD. I use 3.3V. But I get correct reply when I touch the DVDD, can someone please tell me how to avoid that issue.

Thank you,

Yawi

  • 0
    TI__Guru**** 181001 points

    Hi Yawi,

    You are not really giving enough information to go by here.  What is your interpretation of 'correct reply'?  How about taking a look at the solder joints on your board as a starting point?  The TLA2518 datasheet does not specifically say this, but touching DVdd is not required for proper operation of the chip!