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LP2985 相噪恶化

Other Parts Discussed in Thread: LP2985

我们使用LP2985的过程中遇上问题,具体表现为,在做晶振低温相噪测试时发现相噪在1KHZ恶化了5dB,在排查过程中我们更换了2985后,产品恢复正常。再将原2985重新换到晶振上,失效现象却不能复现。目前已经排除了焊接的问题。想咨询一下这是什么原因,谢谢。