Hi Chen, Do you plan to DC couple as well? Typically what is done in these applications with very high input range, eg - +/-10V. Is the attenuate the input signal first, then use an amplifier in the lowest gain setting possible to couple into the ADC. If you don't need to DC couple the signal, then you can use the same signal chain line up but use a balun or transformer. Signal Chain line up: attenuation pad -- amp/transformer - ADC Regards, Rob
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