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请问下,INA826的共模电压为多少?或更高共模电压精密运放推荐

Other Parts Discussed in Thread: INA826, INA149, INA188

根据芯片手册INA826的输入电压为vmax=  vs+40v,但在之后的特性曲线中,共模电压在输入达到15v(供电VS=15v时),输出就达到饱和。主要是826内部结构不清楚是否有分压结构。如果826输入共模电压只有vs电压(最大+-18v),希望能可以推荐一款48V共模电压的、性能接近仪器仪表的运放。INA149倒是高共模,但内部分压比1:20有点高。差分输入vin1-vin2电压最大约42mv,做得是高端电流采样。目前用的是INA188,输入端用电阻分压,但不知道会不会由电阻0.1%精度问题,带来共模信号被误差。谢谢!