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LMV7219: two input options

Part Number: LMV7219
Other Parts Discussed in Thread: TINA-TI,

Dear Sir, good morning!

I need to convert sin signal to logic signal. I have 16.384 Mhz sin generator.  I tested the sircuit "negative" (please, see attach). This circuit works.

I simulated then it in TINA-TI and I have the result:  the circuit  "works" for a few seconds and then gives an "error" (please see attach, docx).

I simulated then the "positive" circuit in TINA-TI and it "works" without error. QUESTION: Is there any fundamental difference between these circuits?

TIA.

Sincerely,

Vladimir Naumenkov

www.agat.by

Error.docxLMV7219_03.02.2020_negative.TSCLMV7219_03.02.2020_positive.TSC