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LMV934-N: Unexpected voltage level on output

ttd
Mastermind 7920 points
Part Number: LMV934-N

Dear Technical Support Team,

Unexpected voltage level on output of LMV934MTX/NOPB.

I'd like to share the detail document such as waveform and schematic through local FAE or message(friendship).

Best Regards,

ttd

  • 0
    TI__Guru*** 145766 points

    TTD,

    I believe we already have a e2e friendship connection.

  • 0 in reply to Ron Michallick
    Mastermind 7920 points

    Hi Ron,

    Thank you for your reply and I apology my late response.

    When investigating the unexpected behabir, I found that ADC doesn't sample at the intended timing due to overload of LMV934-N.

    The LMV934-N doesn't have any specifications for overload recovery time in its data sheet, but if you have any reference values, could you please let me know?

    Basically, I think that the input voltage and gain should be adjusted so that the operational amplifier does not overload (exceeds the output swing).

    Best Regards,

    ttd

  • 0 in reply to ttd
    TI__Guru*** 145766 points

    TTD,

    I don't have any data on that. Over load recovery if present in data sheet is a large signal overload recovery. For small signal, the delay will be greater. The signal is input pin voltage difference while waiting for overload to clear.

    Not letting the amplifier hit rail, clipping, is a valid solution. Using faster op amp is another solution. Picking an op amp with a spec is helpful, but the spec is just a typical value.