LM2917N DATASHEET PDF

The tachom- eter uses a charge pump technique and offers frequency doubling for low ripple, full input protection in two versions LM, LM and its output swings to ground for a zero frequency input. This feature allows either a ground or supply referred load of up to 50 mA. The two basic configurations offered include an 8-pin device with a ground referenced tachometer input and an internal connection between the tachometer output and the op amp non-inverting input. This version is well suited for single speed or frequency switching or fully buffered frequency to voltage conversion applications. The more versatile configurations provide differential ta- chometer input and uncommitted op amp inputs. With this version the tachometer input may be floated and the op amp becomes suitable for active filter conditioning of the tachom- eter output.

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Meztigul Simon Carter Electronics http: 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. Thanks for the info. 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. The rest would be relatively easy with ideal components. National Semiconductor I installed it all on a diesel shunting locomotive yesterday and it now has a working tacho for the first time in many years.

According to dataxheet 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. 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. Electronics Assistant includes all these calculators and more in a stand-alone Windows application.

I have not been able to find a model of this anywhere. Message Edited by noth on Is there any way of applying a positive offset of say 0. I was wondering if anyone had a model of this component. You can datassheet to see if you have it and whether or not it would be suitable for your apllication. Op-amps such as the LM are intended for single-supply operation LM is quad, not sure if there is a single version.

Message 3 of 3. Connectors RJxx RJ45 etc. I am designing a circuit in MultiSim and I am utilizing a LMN pin frequency to voltage converter as part of the circuit. Post any general technical questions here. Message 2 of 3. If you find these calculators useful then why not download Electronics Assistant?

I had the idea to use an LMN-8 omn-8 to voltage converter and after reading through the data knocked up a dxtasheet. Banana Used on test leads etc. Take a look at our beginners guide to datassheet started in the world of electronics.

Message 1 of 3. I have now datqsheet that the output of this chip is limited to this ammount so I need omn-8 ideas please on how to boost the output so it can reach 16v DC at around Hz input. Not sure where to start?

Please let me know if you have such a model. Thanks for any help. Datasheet helps you quickly narrow down your search results by suggesting possible matches as you type. Click here for details. TOP Related Posts.

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LM2917N National Semiconductor, LM2917N Datasheet

Meztigul Simon Carter Electronics http: 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. Thanks for the info. 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. The rest would be relatively easy with ideal components. National Semiconductor I installed it all on a diesel shunting locomotive yesterday and it now has a working tacho for the first time in many years.

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