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TI有没有不错的测电流芯片的方案，需要 正压负压都要能测，可以独立，正压或者负压。范围20V 1.5A以内。最好有参考电路。感谢！！
http://www.ti.com/product/INA181
INA181
这里面全是的
丰俭由人
http://www.ti.com/amplifier-circuit/current-sense/overview.html
都有EVM的SCH的
