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THS4150 Operation different

Elizabeth Jacob
Prodigy 60 points

Dear All,

Two FDA ICs THS4150ID, with IC Marking : 4150-85T-C9EY and 4150-38T-C9EY was present in a single reel purchased and is used together for two stage amplification. 

IC with marking 4150-38T-C9EY in the first stage amplification is giving an output of -10V to +5V.

But when IC with marking 4150-38T-C9EY is used in the first stage then we get from -10V to +10V.

the power supply given is +15V and -15V.

Please let me know if there is a difference in the performance of the IC with these two markings.

Thanks,

Elizabeth

  • 0
    TI__Genius 13935 points

    Hello Elizabeth,

     

    The package marking indicates when the parts were buit.  There should be no performance difference because all parts are 100% tested afer the plastic package is assembled.

    Usually when there is a gross malfunction such as you indicate it is due to poor solder connection.  There are other possibilities like ESD damage, but soldering is the #1 issue we see. 

    Would it be possible to remount the original part and see if the performance is still limited?

     

    What is the load condition?  What is the frequency of the signal?  It is possible that one batch of parts is faster than the other.   When the operating conditions are at the edge of the performance envelope, small changes in part performance can have a large impact on results.

     

    If you can send me a schematic I can review it for you. 

     

    Regards,

    Loren