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原来用的lm2904,5v单电源供电，因为lm2904的失调电压太大，可以用opa2188直接替换吗？谢谢
如果OPA2188的其他参数都没问题的话，比如GBW，SR都符合你要求，使用OPA2188没问题。
谢谢
