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LMG1020: october datasheet change, die change?

Daniel Cletheroe
Prodigy 20 points
Part Number: LMG1020

Re the latest datasheet change in October - the NAND gate was changed to AND.  Is this correct?  Did the die change?  The true table suggests not.  ie  in+ = 1,  in- = 0, NAND output would be 0, PMOS on NMOS off.  AND gate would mean N/Pmos on/off state would be swapped.

Is the logic the same as the preproduction dies?

Thanks

  • 0
    TI__Genius 12990 points
    Hi Daniel,

    Thanks for reaching out to us about this, welcome to e2e!
    Im an apps eng with this part, This DS change was to correct the front page SBD, from NAND which is not correctly reflecting the truth table. Changing to AND gate like in fig6 is simply correcting an overlooked small SBD error. The die and everything else remains the same. Does this answer your question? let me know if you have any more. How are you using LMG1020? what application?

    Thanks,
  • 0 in reply to Jeffrey Mueller
    Prodigy 20 points

    Great, good to know nothing changed, the behaviour I saw on preproduction matches the truth table.

    But in that case... the NAND was correct.

    When the output of the gate goes _low_ the PMOS gets turned on (OUTH=H) and the NMOS turns off (OUTL=open)

    This only happens for in+ = 1 in-=0  eg  in+ NAND ! in-

    Thanks

  • 0 in reply to Daniel Cletheroe
    TI__Genius 12990 points

    Hi Daniel,

    there is actually a 'NOT' on IN- schmitt trigger before the AND gate. So if IN+ = 1 and IN- = 0 then the output is high. Basically for the non-inverting configuration IN- needs to be defeated by pulling it low in order to EN the output by pulsing IN+. Check out table 7.4 - OUTH = 1 only when IN- is low and IN+ is high.

    Thanks,