What are the tradeoffs between passive (transformer) and active (amplifier) ADC front-ends?
There are many tradeoffs between the two. The differences can be summarized in the chart provided below.
Also see attached reference for more information.
List of critical system parameters and which performs best….
Parameter Usual Preference
Passband flatness Amplifier
Power requirement Transformer
DC vs. AC coupling Amplifier (dc level preservation)
Transformer (dc isolation)