Question about analog output and ADC input

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EDA_hg81

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The voltage range of analog output signal is 880mv to 3.5V. But the ADC input range is 0 to 2.5V.

Should I use voltage clipping, voltage divider or use AC coupling to process input signal for matching ADC input range?

Thanks.
 

any good ideas?
 

Wrtie an equation describing the scaling from (0.88, 3.5) to (0,2.5). Implement this equation using opamps.

This worked for me at RF operation, to change swing levels.
 

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    EDA_hg81

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