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ADC Input Impedance Matching AD9656

Category: Hardware
Product Number: AD9656
We are using the AD9656BCPZ-125 ADC in our board and are currently facing challenges in designing the input impedance matching network. We require your assistance in developing an appropriate impedance matching network for the ADC input.
Based on the evaluation board schematics, we simulated the ADC front-end and observed that the input appears to be matched to a 100 Ω impedance. However, according to the AD9656 datasheet, the ADC input impedance varies with frequency.
Therefore, we would like clarification on the following:
  1. Is the AD9656 evaluation board input network designed to provide a 100 Ω input impedance over the specified frequency range?
  2. Or should the impedance matching network be designed based on the frequency-dependent ADC input impedance characteristics specified in the AD9656 datasheet . Your guidance and support regarding the ADC input matching network would be highly appreciated..
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