Is it possible to drive the inputs of the AD9220 with a fully differential op instead of a RF transformer? What order would be a recommended anti-alias filter for this AD?
Thanks a lot,
Yes, you can drive the AD9220 with a differential amplifier, you just need to pay close attention to the common mode voltage of the amplifier output, making sure it matches the configuation of the ADC if you dc couple, The AAF will depend on your application. Some just need a filter to eliminate the wideband noise of the amplifier, others will be designed specifically to eliminate interfering signals that would alias back on the signal of interest. So the AAF is not ADC specific, but application specific.
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