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LM4040-N-Q1 / temperature range

K.Yaita
Guru 29720 points
Other Parts Discussed in Thread: LM4040-N-Q1, LM4050-N-Q1, LM4030

Hi Team,

The datasheet shows the following.



Is temparature range of LM4040QBIM3X2.5 Ta=-40～85℃ because temperature grade is "I"?
If my customer wants Ta=-40～125℃, which LM4040-N-Q1 should he select for B grade(±0.2%)?

Best Regards,
Yaita / Japan disty

  • 0
    TI__Intellectual 1745 points

    Hi Yaita,

    You are correct, the "I" you highlighted denotes the industrial temp range, -40C to 85C.  The extended temperature range (-40C to 125C) is only available for C,D,and E grade parts.  

    The LM4050-N-Q1 (www.ti.com/.../lm4050-n-q1) does have a B grade option in extended temp range. This part offers a lower temperature coefficient (50ppm/C) while maintaining auto qualification.  LM4050BEM3-2.5/NOPB is the part number you would be looking for. 

    Another option for a 2.5V reference around 0.2% initial accuracy over -40C to 125C temperature range is the LM4030 2.5V C grade, which is actually +/- 0.15%, and has a much lower temperature coefficient of 30ppm/C max.  Note that the LM4030 is not auto qualified.

    Chris