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AD7663

Hello,

I have a customer that would like to know the pluses/minuses of using a Vref 2.5V versus the 4.096V reference for the AD7663. I saw that the datasheet has performance characteristics for the 4.096V Vref, but not for the 2.5V. Have you done evaluation with both? Can you share your results? Any opinion on advantages, disadvantages would be great. i.e. performance over temperature, stability over time etc.

Thank you,

Anita

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  • Hi LLoben,

    Can you give us direction on why?  Customer also has additional questions:

    Can I use my own differential amp to drive the inputs?  Do I have to use the amp that is within the chip?

     

    If I use my own differential amp, what do I connect to the differential amp’s Vocm pin?

     

    How do I choose between a 2.5V reference and a 4.096V amp?

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  • Hi LLoben,

    Can you give us direction on why?  Customer also has additional questions:

    Can I use my own differential amp to drive the inputs?  Do I have to use the amp that is within the chip?

     

    If I use my own differential amp, what do I connect to the differential amp’s Vocm pin?

     

    How do I choose between a 2.5V reference and a 4.096V amp?

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