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输入信号，差分信号，±7.5V，共模电压+3.75V，信号带宽小于5KHz。
输出信号要求，差分信号，±2.5V，共模电压+2.5V。
请推荐一款放大器，最好是低噪的，多谢！
有G=1/2的，少见有G=1/3的
不过你可以使用这个可变增益的全差分运放：OPA1632，然后自己配置增益为1/3
看看PGA281能否满足您的要求。。。
噪声有点大
thanks all the same
多谢，我仔细看看
