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您好datasheet Page17 介绍了几种不同条件下的Vsense和Vcm 对输出精度的影响, 分为几种情况介绍的很详细,可以看下,或者参考Figure 5 和Figure 6的曲线,比如我们可以看到共模电压Vcm>=12V 时, output error是最小的。
http://www.ti.com/lit/ds/symlink/ina193.pdf
另外,就是input filter resistor对gain error的影响,根据公式gain error=100-(100*5k/(5k+Rfilt)), 当Rfilt=100ohm时, gain error 可以达到2%。