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LM4040-N: Why not a 3.3V version?

AnBer
Mastermind 29200 points
Part Number: LM4040-N
Other Parts Discussed in Thread: LM4040

Team,

-Any reason why we do not have much 3.3.V Shunt reference with fixed output?
I could only find one:
https://www.ti.com/power-management/voltage-reference/shunt-voltage-reference/products.html#p2519=Fixed&p232=3.3;3.3

-Any plan for a 3.3V in the LM4040 serie?
Diode seems to have it:
https://www.diodes.com/assets/Datasheets/LM4040.pdf


-What precision could be expected with the adjustable LM4041 for 3.3V?
https://www.ti.com/assets/js/compareParts/compare.html?familyId=697&parts=LM4051-N,LM4041D,LM4041C,LM4041B,LM4041-N-Q1,LM4041-N&cols=o1,p232,p2352max,p2519,p536min,p536max,p231min,p2954,p1498,p1130,p3316,p241max,p1192,p390max,o4&lang=en 

Thanks in advance,

A.

  • 0
    TI__Intellectual 1135 points

    Hi A,

    These are good points. I have asked our systems engineers for the first two questions. 

    The precision of adjustable output is strongly dependent on external resistors used to create this reference. As it comes to the reference itself, the reference will have a precision of 1.5% over 100ºC and 1.15% over 65ºC

    Example if you use ±1% resistors, Worst case scenario will be ±2% precision. Hence, total worst case will be 3.5% over 100ºC.

    Hope this answers your question,

    Best,

    Abhishek

  • 0 in reply to Abhishek Wadhwa
    TI__Intellectual 1135 points

    Hi,

    To complete the answer, 

    1. Due to internal reasoning, we only have one 3.3V reference
    2. We dont have any plans to pursue this opportunity yet.

    Hope this answers your questions!