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能否推荐一个运放和adC ADS1120搭配，4~20MA电流信号经过电阻到地，电阻处进入运放组成电压跟随器，后级为ADC为ADS1120。
ADS1120 是一款 16 位高精度模数转换器 (ADC), 要匹配这样的 ADC, 你需要选择高精度的运放, 或者仪表放大器来符合要求
