Order Number LMM-8 or LMN See NS Package Number M08A or N08E. Order Number LMM-8 or LMN See NS Package. versions (LM, LM) and its output swings. Solenoids Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2All trademarks are Product Folder Links: LMN LMN. LMN-8 Datasheet, LMN-8 National Semiconductor Frequency to Voltage Converter Datasheet, buy LMN
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I have not been able to find a model of this anywhere. A simple footprint is easy to make, however, the simulation file s are much more complicated and I do not have to know how to do this. I have now read that the output of this chip is limited to this ammount so I need some ideas please on how to boost the output so it can reach 16v DC at around Hz input.
Thanks for any help. If it is just the output voltage that is low you might be OK with an op-amp on a single supply – after all the output doesn’t need to swing negative. Connectors RJxx RJ45 etc. Set the split to give at least 16V on the positive side, and a lower negative side hopefully enough to give linear response from the amp down to 0V.
I chose the zener version because it offers output stability with supply rail fluctuations which I will have off an alternator, but I think I will try and limit those with a regulator on the supply instead now.
Only problem is that you don’t get a linear response near 0V. Trying to find a component? Op-amps such as the LM are intended for single-supply operation LM is quad, not sure if there is a single version. Message 2 of 3. Click here for details. Not sure where to start?
National Semiconductor – datasheet pdf
Thanks for the info. The only thing that might kill it now is low temperatures as the LM regulator I had on hand was a ‘T’ version which is only good down to 0 degrees C, I may have to upgrade it to an ‘AT’ version at a later date good for degs.
The NS datasheet is poor at explaining this difference but at least one of the example circuits using the has a v output with a 15v supply.
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Electronics Assistant includes all these calculators and more in a stand-alone Windows application. Most Active Software Boards: The datasheet for this indicates that it is only good for 50hz to 1Khz so I don’t know if this would help any depending on the frequency your working with.
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You need to experiment to see if this would work though – it’s not something I’ve had the need to try. Want to suggest a link to add here, exchange links with us or get lm2917nn-8 banner for your website?
Message Edited by lacy on Post any general technical questions here. Please let me know if you have such a model.
Datasjeet hooked up an LM now to supply 20v as you suggested. According to the formulas I should be good up to 30K Hz input it previously stopped increasing at 3Khz not 30 as I had written previously.
You might have to use a lower voltage regulator, a low drop-out type or an LM or similar adjustable regulator set to around 20V or so. Simon Carter Electronics http: Message Edited by noth on Remember that the drop-out voltage of a standard 78x regulator is V, so a probably won’t work.
Tachometer using LMN-8 – Increasing output – Electronics
I installed it all on a diesel shunting locomotive yesterday and it now has a working tacho for the first time in many years. Take a look at our beginners guide to getting started in the world of electronics. Is there any way of applying a positive offset of say 0. Just waiting for my new chip and I’ll report on the results. I had the idea to use an LMN-8 frequency to voltage converter and after reading through the data knocked up a circuit.
The rest would be relatively easy with ideal components. I am designing a circuit in MultiSim and I am utilizing a LMN pin frequency to voltage converter as part of the circuit.