General Description. The AS and AS are junction isolated ultra well- matched monolithic NPN transistor pairs with an order of magnitude improvement in. LM/LM Supermatch Pair. General Description. The LM and LM are junction isolated ultra well- matched monolithic NPN transistor pairs with an. LM datasheet, LM circuit, LM data sheet: NSC – LM/LM Supermatch Pair,alldatasheet, datasheet, Datasheet search site for Electronic.

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Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site the association bonus does not count. Search the directory for faculty or staff members. You can find them here But the plant does not sell them directly.

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What is the new standard log amp circuit? How about the LS from Linear Systems? To see a list of open positions, click here. This is daatsheet not the way to go unless there is a need for an LED bargraph in the circuit already. This circuit looks to be a log amplifier using two op-amps, two transistors, a few passives and a current source. You can also see open positions in the department.


The chip has almost the same name: So Maxim doesn’t have any either. By using our site, you acknowledge that you have read and understand our Cookie PolicyDatasheeet Policyand our Terms of Service. I can use LM array, but the specs are far worse. But National discontinued this part last year with no clear replacement.

LM Datasheet(PDF) – National Semiconductor (TI)

Would you like to answer one of these unanswered questions instead? Roman has mentioned that component. TI still lists the part in their catalog, but designates it as obsolete. MikeJ-UK 5, 11 Open Positions To see a list of open positions, click here.

Engineering Program is accredited by: That’s an interesting forum thread, especially the story about MAT However, I’m not sure how suitable it is for your application. There is no commitment that if you design it in to your circuit, you will be able to purchase it later.

Home Questions Tags Users Unanswered. Octopart is not comprehensive. TI still sells some Burr Brown log amps but they are expensive.

You have to find the dealer in Moscow can find an email or phone in case someone need it. I don’t know what the definitive chip is but there are many chips that implement the whole ddatasheet. This circuit uses the difference of two transistor currents to generate the log of the input over a pretty wide range.


That would more-or-less be an interpolation between 3dB values. Especially in this circuit, which lives and dies by transistor matching, the simulator is going to give a very optimistic performance estimate.

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I’m not sure to what extent other parameters would matter, though. There are plenty of arrays of ‘ or ‘ available, but there is no mention of matching in the datasheet.

So no cheaper than the Dtaasheet I’d rather the LOG and skip the Maxim hassle. In addition to supporting the various labs in the EL building, we also provide equipment and manual check-out and a wide range of electronic components for sale. They are just listing the National Semi datasheet as a courtesy since they bought National. The transistors might be on datasheeg dies for all I know. TI has a bunch of chips that implement log amps. Those “transistors” are identical.

MAT12 is still in production, but octopart. Joseph Perkins 1 1. How can I cheaply make a logarithm?