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UC1842: UC1842J883B

Part Number: UC1842

UC1842J883B   30 T03836136   购买30pcs 其中有4个检查不合格 功能失效。帮看下什么原因,谢谢

以下有四项超出规定测试值,第一项开环增益实际测试为34dB小于最小测试值,技术要求要达到65以上;    第二项电源抑制比实际测试为50dB小于最小测试值,技术要求要达到60以上; 第三项增益实际测试为25V/V大于最大要求测试值,技术要求是2.850-3.150之间; 第四项输入电压实际测试为14.48大于最大要求测试值,技术要求是0.90-1.10之间