
原理图如上,我查阅OPA548的规格书中是写的在单电源操作中,输入共模范围可扩展到地电平以 下;但是在该电路中,我在DAC输出0V(DAC自带偏移10mV)的情况下,OPA548的输出端依然有近500mV的输出,这是否有办法改善?
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