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LMC7111 same pinout replacement?

Paul Perlic
Prodigy 10 points
Other Parts Discussed in Thread: LMC7111, LMC7101, TLV2731, TLV2711

Hi,

 

I have a design with a LMC7111BIM5NOPB but need to replace it with a same pin-out part with a higher GBW. After some seaching of other op-amps, it seems the pinout of the LMC7111 is unique (the power inputs are reversed). Does TI have any other op-amps with the same pinout?

 

Thanks,

Paul

 

  • 0
    TI__Mastermind 49906 points

    Hi Paul,

    Yes...The LMC7111 and LMC7101 suffer from "Early Adopter Syndrome". They were among the first op-amps introduced in the SOT-23 package many moons ago, and in those wild-west days, the pinouts had not "standardized" yet. Combined with a positive die attach, it got stuck with the unusual "reversed supply" pinout.

    The LMC7111 is the low power (50KHz, 25uA) version of the LMC7101 (1MHz, 500uA). So if you need about 1MHz, then the LMC7101 is the natural replacement.

    The TLV2711, 2721 and TLV2731 also have the same pinout. The 2711 and 2721 fill the gaps between the 7111 and 7101. The TLV2731 is 2MHz GBW, so that would be your "fastest" option. Note that the TLV's are 10V vs the LMC's 15V max supply.

    Regards,