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想把一个0--30V的直流信号转换成-10--10V供给AD芯片采样,考虑到转换的精度，希望使用运算放大器，求一个满足0--30伏输入的运放型号。谢谢大家！
如果有其他较好的转换方法（须保证精度）也可以交流下，感激不尽！
0--30V的直流信号；使用ADS7805采样-10--+10的直流输入信号。
