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Original question:

LMV358: LMV358 Noise is 30-60 times higher as the typicaly noise of 39nV/Sqrt hz

LMV358: Popcone noise

Mochi
Genius 3865 points
Part Number: LMV358
Other Parts Discussed in Thread: TLV9002-Q1

Hello
Our customer is facing random popcorn noise problems with LMV358Q1.
In the TEST environment 100msec duration DC step noise occurs around every 10 seconds.
The failure rate is 55 out of 281.

The Vn noise specification of the datasheet is 39nV/rtHz(typ), but popcorn noise will not be included.
What is the performance of random popcorn noise levels on LMV358Q1?
We can send detailed TEST data through e-mail communication.

Regards
Mochizuki

  • 0
    Guru 140200 points

    Hi Mochi,

    the LMV358 is a low cost bipolar OPAmp. You should not expect all too low noise levels and the total absence of popcorn noise. Also keep in mind that in the datasheet only typical noise data is given without any maximum specs.

    Improper soldering with too long periods of too high temperature could be another cause for increased popcorn noise.

    Can you show some scope plots of the popcorn noise?

    Kai

  • 0
    TI__Guru*** 140016 points

    Mochizuki-san,

    Popcorn noise is primarily a bipolar process issue. Therefore I suggest TLV9002-Q1, which has a CMOS only design. Both of these devices only have typical noise specifications. However popcorn noise is not expected on TLV9002-Q1. I have no data for the rate of occurrence for popcorn noise for LMV358.

    If you would like to send private data, then accept my friend request. Then send data in a new private message.

  • 0 in reply to Ron Michallick
    Genius 3865 points

    Hi Kai and  Ron,

    Thank you for your prompt reply.

    A captured data from the customer will be sent to Ron-san as private message.

    Regards,

    Mochizuki