Welcome, Guest. Please login or register. Did you miss your activation email? This topic This board Entire forum Google Bing. Print Search.
I am not familiar with their ICs. For now, the physical LM circuit tends to self-oscilate, but only sometimes. M Super Contributor Posts: There used to be a LM The following users thanked this post: schmitt trigger.
LT or thereabouts, I suppose. Obviously, it significantly outperforms the LM Bringing a project to life? Send me a message! Will try, thank you. For now I am using LT, and it doesn't oscillate like the physical circuit does.
I'll just redo the existing shoddy design to get rid of the capacitive load. You need to make an account and join the group to access the files, but now it's instant - you don't need to wait a day for a person to approve you.
You can disable emails, so you can just join for the files. Quote from: RoGeorge on December 06,pm. The following users thanked this post: HackedFridgeMagnet. Kleinstein Super Contributor Posts: Country:. The output cross over distortion of the LM can responsible for some odd errors.
For each "build," the SPICE simulator randomly varies the component values within theircircuit operation; you should also build and test the circuit. Note 6: Human body model1. Short-circuits from the output tomodel : a pF capacitor is charged to the specified voltage, then discharged through a 1.
Machine model : a pF capacitor is charged to the specified voltage, then. Note 8: Human body model1.
Note 9Additional single-supply applications ideas can be found in the LM datasheet. These featuressupply voltage range of the LM is smaller than that of the LM The LM series is equivalent to one-half of an LM These amplifiers haveRev.
Please refer to the datasheetinformation on those packages. Since assembly of the die is doneInformation section of this booklet. The devices are. These amplifiers have, - Rev. Abstract: 1. Human body model : a pF capacitor is charged to the specified voltage, thenconnected pin combinations while the other pins are floating.
Pin Name. Output of Op-Amp 1. Inverting Input of Op-Amp 1. Non-Inverting Input of Op-Amp 1. Ground or Negative Supply Voltage. Non-Inverting Input of Op-Amp 2. Inverting Input of Op-Amp 2. Output of Op-Amp 2. Positive Supply Voltage. Above is the supply configuration for both single and dual supply connections. LM is a dual op-amp IC integrated with two op-amps powered by a common power supply. It can be considered as one half of LM Quad op-amp which contains four op-amps with common power supply.
The differential input voltage range can be equal to that of power supply voltage. The default input offset voltage is very low which is of magnitude 2mV. The typical supply current is uA independent of the supply voltage range and a maximum current of uA. Subscribe to stay updated with industry's latest Electronics components and news. Littelfuse's Nano2 F series enhances protection from overload and short circuit current events. Stewart Connector's SS series jacks are ideal in 2.
Brief description: LM is a dual op-amp IC integrated with two op-amps powered by a common power supply. Component Datasheet. Get Our Weekly Newsletter!
741 Pin Compatible Equivalent Op Amps
Littelfuse F Series Fuse. Amphenol Millimeter Wave Interconnects. Amphenol SV Microwave features their high-frequency millimeter wave coaxial connectors. Stewart SS Series. AVX Position Sensors.Forums New posts Search forums. Articles Top Articles Search resources. Members Current visitors. Log in Register. Search titles only. Search Advanced search…. New posts. Search forums. Log in. Welcome to our site! Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets.
Looking for LM replacement. Thread starter Waldo Pulanco Start date Dec 3, Waldo Pulanco New Member. I am looking for LM Replacement, that there is no change the value of resistor or other component for the use of LM The lousy old LM has crossover distortion so it should never be used for audio. Hi, Now i wonder who told you that big chuckle as if i dont already know and so does everyone else here hee hee.
That is partially correct, but on the other hand it does depend on what you want to use it for and the frequency specification alone is not enough to go on. We also have to have some idea what kind of output amplitude you are after and if you have any specific distortion goals in mind.
If you only need low output amplitude it may work for you, but if your needs are too great then another op amp will have to be found. So you have to more or less specify the following: 1. Frequency max. Output amplitude peak max. Supply voltages available. If possible, the actual application it is to be used in.
The TL op amp is an interesting device. It may or may not fit your application though and there are so many op amps out there to choose from, so it's best to state as many spec's as you can here. Last edited: Dec 3, Sorry hehehehe!! I use it with stereo coder!!
Looking for LM358 replacement
Hello again, What supply voltages will you be using? Will the output swing plus and minus? To get the distortion in line, you have to bias the output with a resistor from the most negative supply voltage to the output. That eliminates the crossover distortion. If this is to be a very high end system you may want to use a low distortion type op amp made exclusively for audio applications though.Latest Projects Education.
I heard that the lm is a single sided IC, and the is not. I guess this explains why the circuit failed to work. It is definitely soldered correctly with all the other correct components. Can I do something to make the 's work for me?
Make them single sided? Scroll to continue with content. Audioguru Joined Dec 20, 11, The inputs of an LM work all the way down to the negative supply voltage which can be 0V and its minimum supply is only 3V. Its output goes down almost to the negative supply voltage which can be 0V.
But the has inputs that might not work if they are within 3V of the negative supply voltage and its output might not go down to within 3V from the negative supply voltage. With a supply as low as 6V it barely does anything. Post your schematic and we will show you why it does not work. Here it is: Left side of circuit voltage multiplier works perfectly. Wendy Joined Mar 24, 21, The two chips have similar pinouts, but there the similarity ends.
The is much older, and has much worse specs. They aren't interchangeable. Looks like yet another Geiger counter circuit. We've been seeing a lot of those. It was intoduced by Raytheon in You must log in or register to reply here.
You May Also Like. Continue to site. Mar 26, LM OP Amp with flying leads. General Electronics Chat. Feb 23, There are many compatible chips readily obtainable; however, the problem is that many students and colleges are not aware of the different manufacturers and the model numbers.
Consequently, some chips have been getting expensive due to students relying too much on one model and manufacturer. The is the one everyone thinks of when looking for a general-purpose amplifier, however, if you rely too much on the same chip and seller, they will sometimes artificially hike up their prices. You can make your budget stretch further if you look for cheaper equivalents. Almost all the modern 8-pin operational amplifiers take their architecture from the earlier chip.
Many manufacturers have made minor changes to the original design, however for the most part they are pinout equivalents, and the same formula for gain calculation applies. If you were using an op amp for simple educational experiments to calculate the gain, or perhaps for simple basic op amp circuits, then many cheaper equivalents would perform just as effectively, and save you money.
I have compiled a list of my favourite chips that are readily available and affordable. The LM is a classic op amp chip and as you can see, it has a very simple and standard layout that is identical to all the chips mentioned on this page. This is a general-purpose amplifier utilising bipolar junction transistor technology. Even with all the modern day equivalents, the LMCN is still a very cost effective chip at around 54p each or 32p when you buy from Farnell.
CAE is pin equivalent to the LM There is a minor difference in that pin 8 is for the strobe function, which controls the output, however, for basic op amp circuits it is not used. The CAE is a direct replacement for theand the manufacturers designed it with this being the main purpose. TLCN is another favourite of mine because it is affordable. You can pick one of these up from Maplin for around 62p whilst you are on your way to the chip shop. This is a general-purpose operational amplifier with a JFET input, which is even better because its input impedance will be high.
This means you could connect the inputs directly to a signal source with minimal impedance issues. Your basic op amp circuit configurations will be the same and you will be using the same formulas. You can get these from RS at very affordable prices. This is the low noise version, which is extremely useful for high-fidelity audio applications. It has JFET inputs and is pin compatible with the However, Farnell have the LFN, which is an equivalent for 38p. This is one of my favourites as it is almost identical to the old in technology.
This one is the most affordable I could find from Farnell at just 38p each or 29p when you buy Texas Instruments have one of the largest ranges of integrated circuits that are pin compatible, with JFET inputs. Here is a list showing the approximate price for one at Farnell. Obviously, it will be cheaper for bulk purchase. These CMOS operational amplifiers will operate on a voltage as low as 2. These are ideal for battery powered circuits and portable devices. The common mode input voltage range will go 0.
Both chips are pin identical toexcept the MCP has a chip select on pin 8. This is useful if you wanted to switch audio signals, otherwise, you could always tie it permanently to ground. If you required high-speed and precision, and money was no object, then this IC is ideal for precision instrumentation, medical equipment, and professional audio. Mr Vis Education Donate.I am to "test" a filter, build around LM, but all op. What LT?? It is not even a usable walk arond, to change program becouce one component are lacking in the lib.
If you beleved it your self, you would add a link to the program. Try it! You do realize that SPICE op-amp models are, in general, only crude approximations of the actual device don't you? Usually for such a complicated device as a OA one has to write your own model incorporating controls for the parameter the one is interested in. Else one just uses a generic OA model. Skip to main content. LTSpice, LM Log in or register to post comments.
Go To Last Post. Level: Resident. Posts: View posts. Posted by mossige : Wed. May 25, - PM. Fivestar widget 1 2 3 4 5. What are the general solution of this problem? Tags: Learning and InformationGeneral Electronics.
Level: Raving Lunatic. Log in or register to post comments Top. What's wrong with changing programs? It's the easiest way to solve a problem like that. You probably won't find an LT equivalent of the LM