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您好,INA199 不支持双电源供电呢,可以看下它的每个引脚电压范围,其中V+代表的是供电电压,典型值为5V。 其次pin2 不是V-, 而是GND,如果是V-的话,那么就可以双电源供电了,既可以接GND,也可以接负压。