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LMC7101AIM p2p compatible with low offset

Other Parts Discussed in Thread: LMC7101, TLV2721, TLV2711, TLV2731, OPA170

Hello team,

Too have better performance in an old board, my customer would like to found an AOP p2p compatible with the LMC7101AIM with a better offset,

The main point is to find a solution with power supply + on pin2 and power supply - on pin5

This AOP must have an very small offset, because the lmc7101 offset is 6mv. Could you provide me a solution?

Thanks in advance.

Pol

  • Hello Pol,

    I will look into what we have that is p2p compatible with LMC7101 and have an answer for you shortly.

    Best,

    Errol Leon
    Precision Op Amps Applications
  • Hello Reymond,

    The "A" grade of the LMC7101 is 3mV max at room.

    The TLV2711, TLV2721 and TLV2731 have the same pin-out (Northwest with reversed supplies), but they are NOT R-R input and 10V max. All are also 3mV max.

    The TLV2731 would be the closest match, the '21 and '11 are lower power versions.

    Regards,

  • Hi Pol,

    The pinouts of LMC7101A is very special. I was not able to find direct pin-to-pin options. However, we do have some higher precision, and lower power products in the SOT-23 package (with power supply pins reversed). The OPA170 is an example, which is 2.7-36V, 1.2MHz, 110uA/ch, and rail-to-rail output. You can find its package pinouts HERE.

  • The LMC7101 was one of the first op-amps in SOT-23, released almost 20+ years ago..(geez...and I remember that...). The SOT pin-outs were not "standardized" then.

    The current most common SOT pinout now is similar for the signal pins, but with the supplies reversed (V- on pin 2, since the die paddle is commonly connected to pin 2). Because of this, there are very few improved "drop in replacements" targeted at the 7101 pinout.

    Obviously, the recommendation is that they revise the board to swap the power supply pins, as that would allow many more options.

    Regards,