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MOM or MIM capacitor to use in SAR ADC

Ricardo Alves

Can anybody tell me which capacitor (MOM or MIM) is better to use in a SAR ADC? And what are their main differences in terms of parasitic and mismatch? 

Thanks in advance.

Best regards,

Ricardo Alves 

  • In terms of parasitic an mismatch MOM probably better. But commonly used are MIM's.

    Probably it's first becauce to have same capacitance for MOM requere much mor area that for MIM, and second it's because MIM have more precice and reproducible technology that MOM.

    So I suggest  you to use MIM.

  • @VKhlyupin : MOM capacitor requires less area as compared to MIM. Other advantages of MOM capacitor are high density, use of standard process and scalability, good matching characteristics, low parasitics.

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