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DC Coupled, Variable Gain, 12 bits 20M ADC Pre-processing Circuit Design

Question asked by 朱煦然 on Aug 11, 2016
Latest reply on Aug 15, 2016 by DougI

In my project, I am going to use AD9649 to achieve a 12bits 20MHz sampling rate convert circuit.


The problem is the circuit required DC coupling, the bandwidth should be over 1MHz and could achieve variable gain control function in which the step should be less than 0.5dB.


Can anyone recommend me some possible IC or circuit that can satisfy the above requirements?