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Split capacitor topology in SAR ADC

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shanmei

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Does anyone know how the author directly obtain red cycled part in the equation? Thanks.

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Source: https://studylib.net/doc/18887148/design-of-a-12bit-500ms-s-standalone-charge-redistributio...
 

Have you tried looking in the references he lists: Baker, WIlkner, Carusone ? Most likely explanation is in there.
 

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    shanmei

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    ecsuriya

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The reference helps. Thank you,
 

Not directly related.

This shows the mapping. Assume in the LSB array, a capacitors connect to Vref, and (8-a) connect to gnd. The Vref map to the Vb is scaled by 1/2^6.
Thanks.

cap.PNG
 

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