Changed layout of National Data Sheet to TI format. LevelC-UNLIM. to LMM. LMN. ACTIVE. PDIP. NFF. TBD. Call TI. Call TI. LMN Datasheet, LMN National Semiconductor Frequency to Voltage Converter Datasheet, buy LMN. LMN LM – Frequency to Voltage Converter, Package: Soic Narrow, Pin Nb= The LM Details, datasheet, quote on part number: LMN.

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I have followed the datasheet of LMN to design a frequency to voltage circuit. This version is well suited for single. With this version the tachometer input may be floated and the op amp becomes suitable for active filter conditioning of the tachom- eter output.

LM, LM and its output swings to ground for a. I’m trying to sense the freq of a square wave from 10KHz – 40KHz range. Potentiometer Questions Started by norbss Yesterday at Thank you a lot.

Don’t worry about calculating the R1,C1,C2 values. Frequency to Voltage Converter. Datasheets, Manuals or Parts. National Semiconductor Electronic Components Datasheet. This op-amp works as a sort of ‘trip amp’, whenever the input on pin 1 exceeds the voltage on pin 8 0vthe output to the charge pump will go high, being low at all other times.

Click here to register now. Stick with the LM I’m sure the LM is capable of doing what you want, it just needs some component changes to set the range.

You can then drive the transistor to give you an output of up to Vcc. You must log in or register to reply here. Replacement Transformer Started by ncag 47 minutes ago Replies: Why not connect the output to a transistor base. I don’t know why. Or any other methods can achieve the task? The more versatile configurations provide differential ta- chometer input and uncommitted op amp inputs. Replacing a 4 pin leaded inductor with a 2 pin Started by gkmaia Yesterday at Welcome to our site! BUT As the circuit will lose some voltage it will stop short of 12v out.


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. Any suggestions on how to implement that? The 8 pin package has the op-amp input stage’s inverting input connected to ground via pin 8ln2907n non-inverting input is on pin 1.

LM2907N Datasheet PDF

Sorry, can anybody give me advice or the circuit is correct or any incorrect place? Can any professional give me a design which can achive a higher range of output, e. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. To participate you need to register.

Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. Both of these configurations are available with an active shunt regulator connected across the power leads.

LMN Datasheet(PDF) – TI store

Thank you very much. Also, I need to be very conservative wrt adding components. Sorry, can you give me any advice of which type can do such thing?


Also, lmm2907n ripple of the output will affect the output range or not? This feature allows either a ground or supply referred load of up to 50 mA. Sebi Active Member Jul 2, Datxsheet 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.

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Design Frequency to Voltage Circuit of LM2907N

That range can give me a larger range to have a more accuracy signal to do speed control. This is important as the input signal MUST cross this zero volt threshold:!: The regulator clamps the supply such that stable frequency to voltage and frequency to current operations are possible with any supply voltage and a suitable resistor.

To do better requires more info – supply voltage, rest of circuit components? But I still cannot be sucessful datashert make a larger voltage output range. Satasheet 2 more ics datqsheet do the trick is not an option. Other than that you said the circuit worked, just gave the wrong rangethe diagram you posted is correct, the vaues should be OK.

As i read from d’sheet it can’t do this. The input signal must therefore go positive AND negative for the circuit to work. I have made the circuit but seem not work.

The LM, LM series are monolithic frequency to.