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不好意思,还有就是发现ina33a的供电时正负2.5,因为他的压差不能超过5.5V,然后opa690时正负5V,想问下有什么办法能够只用正负5V吗 ,电阻分压的话可以吗???
你这100k的电位器就是祸根。改成1k 0805贴片电阻即可。