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电压为10KHz方波，幅度为1μV~100μV，想通过一级放大至ADC可以采样的电压，请问运放如何选型
噪声要求越低越好。
亲；建议看看OPA2192。由于信号幅值非常小；建议做两级放大。即能保证方波低失真也能保证AD能接受到足够高幅度。
首先得考虑选用低失调电压的运放，看了下TI的精度运放中，失调电压最小的也有1uV，比如TLC2652A。
