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LM124A: LM124AJ

js moon
Prodigy 20 points
Part Number: LM124A
Other Parts Discussed in Thread: LM124-N, LM124,

Hi, 

I requsted LM124AJ, but our distributor found a stock LM12AJ/PB instead and said I can use LM12AJ/PB but  our engineers found some difference between LM12AJ and LM124AJ/PB. Please let me know this answer.

1.     Differential Input Voltage - LM124AJ :+-32V / LM124AJ/PB : 32V. -->Question1:  Can LM124AJ/PB availble -32V also?       

LM124AJ page 4; http://www.ti.com/lit/ds/symlink/lm124a.pdf         LM124AJ/PB page 4; http://www.ti.com/lit/ds/symlink/lm124-n.pdf  (These are spectation from the TI)

2.  Input Bias Current  - LM124AJ :- 50  /  LM124AJ/PB: 50     -->Question2: Is the current reading different due to a different measurement method?

LM124AJ page 5 http://www.ti.com/lit/ds/symlink/lm124a.pdf         LM124AJ/PB page 6; http://www.ti.com/lit/ds/symlink/lm124-n.pdf

3.  V(ESD)    - LM124AJ : +-500V  / LM124AJ/PB: +-250V       -->Question3 : Why is LM124AJ/PB lower than LM124AJ?

LM124AJ page 4; http://www.ti.com/lit/ds/symlink/lm124a.pdf        LM124AJ/PB page 4’ http://www.ti.com/lit/ds/symlink/lm124-n.pdf

Question 4: Please let me know "Power Dissipation" for LM124AJ

Page 5; http://www.ti.com/lit/ds/symlink/lm124a.pdf

Question 5: Please let me know "Slaw rate" for LM124AJ/PB

  • 0
    Guru 140200 points
    Hi Js,

    the LM124 and LM124-N are different chips. The LM124-N is the original from National Semiconductors and the LM124 is a clone from TI. And different chips have different specifications...

    Kai
  • 0 in reply to kai klaas69
    Prodigy 20 points
    Thanks for the reply, but I need to a difference LM124AJ and LM124AJ/PB. Not LM124 and LM124-N. And Ti customer told me that both parts are same chip.
  • 0 in reply to js moon
    TI__Guru 52926 points

    Hello JS,

    Kai is correct.

    The LM124AJ/PB is the old National version (LM124-N), and the LM124AJ is the TI version (LM124A).

    The die is different, as they were originally designed by two different companies (at the time), but they are functionally and electrically similar. So for most applications, they are drop-in replacements.

    So unless you are running the LM124's at the edges of operation, it should drop-in replace without any issues.

  • 0 in reply to js moon
    TI__Genius 17085 points

    Hello JS,

    Just to add a little bit of additional information:

    TI has stock for the LM124AJ so you should be able to find some at a distributor.

    The other difference between the LM124AJ and the LM124AJ/PB is the lead finish.   The LM124AJ has NiPdAu plating while the LM124AJ/PB has SnPb solder dip.