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Match input impedence of SAR ADC to 50 ohm termination

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je01911

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Hi,

I want to match input impedence of differential type SAR ADC to 50 ohm termination.

How can I do this in IC design ?

Can I just attach the 50 ohm resistor before sampling swithches?
 

Normally you put the 50 ohm resistor from the input to common. I assume the sampling switches look like a relatively high impedance to the input.
 

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