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TLC2254输出失真

Other Parts Discussed in Thread: TLC2254, TLV2254

在SCH的原理图中,输入INP为几mA的电流信号, 图1-3为输出波形。当采用TLV2254的时候,图1为输出正常波形; 当采用TLC2254之后,出现如图2的输出波形;如果降低外部电流输入,波形逐渐正常,如图3;如果继续降低电流, 最后波形与用TV2254完全一样正常了。 刚开始以为是phase reversal, 后来想想觉得不对,对比了TLV2254/TLC2254的数据手册,也没有看出能说明问题的区别来。茫然,希望高手解答。谢谢!

2254issue.docx