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TL072单电源供电5V,当输入小于4V时，第一级运放失效，保持3.76V，第二级保持1.699V；当输入大于等于4V时，第一级运放工作正常（符合增益），第二级运放失效，保持3.94V。换了轨到轨运放芯片OPA2197，工作正常。请问，TL072是否不支持电源供电，理由是什么？（结合规格书）
