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TL592B: Low Noise (Vn)

Renan Santos Adriano
Mastermind 26115 points

Part Number: TL592B

Hello Team,

The datasheet on the first page stated that the noise Vn is 3 mV (Typ). Checking further in the datasheet shows that Vn is 3uV. Can you share with me the correct value? or did I miss something?

Regards,

Renan 

  • 0
    TI__Mastermind 32355 points

    Hello Renan,

       I will have to look into this, and get back to you by end of this week.

    Thank you,

    Sima

  • 0
    Guru 140200 points

    Hi Renan,

    3mV is way too high. This would mean a noise voltage density of

    3mV / SQRT(10MHz) = 950nV / SQRT(Hz)

    3µV, on the other hand, seems to be a bit more realistic, but now a bit too low:

    3µV / SQRT(10MHz) = 950pV / SQRT(Hz)

    Looking into the datasheet of NE592 says 12µV, which makes more sense to me:

    12µV / SQRT(10MHz) = 3.8nV / SQRT(Hz)

    Maybe the correct value in the "electrical characteristics" shall be "13µV" and not "3µV"? This would make sense as it would correspond to a source resistance of 100R :-)

    Kai

  • 0 in reply to kai klaas69
    TI__Mastermind 32355 points

    Hello Renan,

       I could not find any useful internal information on this device. The best comparison would be Kai's reply due to the TL592B being a replacement device for the NE592. Thank you Kai for this analysis. The correct value should be 13µV. I suggested a replacement device in this thread. Let me know if this is a different application than what is described in that thread.  

    Thank you,

    Sima