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用DSP2810采样电流误差很大



我在做电机控制的闭环实验,用电流传感器检测三相电流,电流传感器基准电压时1.5V,转换率是0.048V/A,2810的AD是12位,电压范围是0~3V,当把传感器输出的采样电压输入到AD中时,数值跳变很大,零位的时候数值跳变很大,最大的跳变有0.9A,我想问一下有没有办法消除这些误差