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the peripheral circuit of AD7278

Hello,

             now I use AD7278 as a part of my data acquisition system,all my peripheral circuit of AD 7278 is given in the follow image,I think there must be something wrong in my design,can you give me some advice?Thanks very much!!

Regards to all.

Thank you.

  • Hi,

    I see that what you attached is from the AD7278 datasheet; there should be no problem with this. What caused your concern as to your design? Are the conversion results wrong?

    Regards,

    Karen

  • Hello KarenNE,

           Do you think the AD7278 can work if I connect the peripheral circuit like the image I have attached above? What I wonder is that does the cs pin , sclk pin and the sddata pin need any pull-high resistor or capacity when be connected to the IO pins of FPGA?Or they can be connected to the IO pins of FPGA derectly? Thank you very much!!

             PS:I do think there's something wrong with the conversion results ,and I hope to conmunicate with you about that after I have a further study about it.

    Thanks a lot.

  • Hi,

    There’s no need for pull up resistors on the digital pins of the AD7278. Let me know if you have investigated your conversion results. If you can get me scope shots of your digital pins, it would be of help.

    Regards,

    Karen