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INA226: 电流测量有一个恒定的0.6A的偏差

Part Number: INA226

使用0.5mR的采样电阻,CURREN_LSB=0.005,CalibrationRegister寄存器设置为0x800,读到的电压正常比较准确,但读取电流计算结果有个0.6A的固定的偏差,及时CURREN_LSB设为0.01设置CalibrationRegister寄存器为102,读取电流计算后结果依旧是有个0.6A的偏差,一下是我用的电路图