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LM94021: Alternative to LMT86QDCKRQ1 ?

AnBer
Mastermind 29360 points
Part Number: LM94021
Other Parts Discussed in Thread: TMP235, TMP235-Q1, , LM94022, LMT86

Team,

Looking at available alternative to LMT86QDCKRQ1.
The LM94021 is on stock on TI.COM.
Can it be an option and what needs to be taken into account?

In the below post we advise to use TMP235. I assume as it is because we have a higher confidence in manufacturing capacity with TMP235:
https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/1023405/lmt86-dropped-in-alternative-to-lmt86qdckrq1
Are there some specific reasons for which we would discourage to use LMT94021 / LMT94022 as LMT86QDCKRQ1 alternative?

Thanks in advance!

A.

  • 0
    TI__Genius 9675 points

    Hi A,

    As advised in the e2e post that you referenced, we recommend the TMP235 as a drop in replacement. This is our latest analog temperature sensor compared to the LMT devices. The TMP235-Q1 is P2P and can be dropped right in. You will need to take into account the gain option. TMP235-Q1 has a relatively same gain of 10 mV/C but the gain is positive instead of negative.

    Jalen

  • 0
    TI__Mastermind 39845 points

    Hi A,

    Jalen is right that we'd like to steer customers towards TMP235. However, we understand that many products are hard to source today. LM94022 is a good alternative to LMT86. LM94021 could be an alternative, but please check the load regulation spec is acceptable for your application. 

    thanks,

    ren

  • 0 in reply to Ren Schackmann
    TI__Mastermind 29360 points

    Ren, Jalen,

    Thanks for the answer.
    Can you please clarify what you mean by Load regulation?

    I looked at the datasheet but I am not sure to really understand the term.
    I could not find info neither in the Engineer's guide SLYY161 nor in the precision lab training.
    Do we have a kind of app note/training that cover this?

    Thanks in advance,

    A.

  • +1 in reply to AnBer
    TI__Mastermind 39845 points

    Hi A,

    Load Regulation is the device's ability to maintain the correct voltage at the output despite demands placed on the drive circuitry. You'll need to review the Load Regulation spec for each device, as well as the Load Regulation charts. LM94021 is not capable of sourcing as much current as LM94022/LMT86.

    thanks,

    ren