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  1. #1
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    Topology selection of 12Bit 1MSpS SAR ADC for rail-to-rail input range

    Guys,
    I need to design 12Bit 1MSps SAR ADC with input having of 0~VDD range and 20KHz. Input will be coming from selection MUX. Can single-ended topology cover for this spec or should go with fully differential topology?

    And if I pick fully differential topology, I need to single-to-differential converting for ADC input. Then it will be tough to design it for 0~VDD input range. Any good idea to design single-to-differential converting for 0~VDD input range?

    Thanks

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  2. #2
    Newbie level 4
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    Re: Topology selection of 12Bit 1MSpS SAR ADC for rail-to-rail input range

    single ended structure will be enough. I have designed one.

    if use single to differetial converter, you can set the gain low than 1 to release the output swing of it.



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