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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LM2907N Datasheet PDF

The more versatile configurations provide differential ta- chometer input and uncommitted op amp inputs. Media New media New comments Search media. For a better experience, please enable JavaScript in your browser before proceeding.

Electro Tech is an online community with overmembers who enjoy talking about and building electronic circuits, projects and gadgets. This is important as the input signal MUST cross this zero volt threshold:!: Thank you a lot. The input signal must therefore go positive AND negative for the circuit to work.

So, can you give me any advice about the accuracy of the circuit? I’m trying to sense the freq of a square wave from 10KHz – 40KHz range. Now I understand the chip gives you a 0volts to Vcc variation for 0 Hz to fmax. Klaus New Member Jul 3, Datasheets, Manuals or Parts. I have followed the datasheet of LMN to design a frequency to voltage circuit.

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. Any suggestions on how to implement that?


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. LM, LM and its output swings to ground for a. As I want to know the attached circuit is correct as what you mention? I am before use the below circuit lm207n it work. Or any other methods can achieve the task? It only can be varying within V output for 40Hz input.

Both of these configurations are available with an active shunt regulator connected across the power leads. To do better requires more info – supply voltage, rest of circuit components?

LMN Datasheet(PDF) – TI store

As i read from d’sheet it can’t do this. I don’t know why. The two basic configurations offered include an 8-pin device. This version is well suited for single speed or frequency switching datasueet fully buffered frequency to voltage conversion applications. So, what can I do. Sorry, can anybody give me advice or the circuit is correct or any incorrect place?

Other than that you said the circuit worked, just gave the wrong rangethe diagram you posted is correct, the vaues should be OK. You can then drive the transistor to give you an output of up to Vcc. LM – 8 pin package As you show the 8 pin package circuit, I assume this is what you have – there is a 14 pin version as well.


But I need 10khz to 40khz give me a 0 volt – Vcc variation.

LMN Datasheet(PDF) – National Semiconductor (TI)

Adding 2 more ratasheet to do the trick is not an option. But i want to know the accuracy of this circuit? By continuing to use this site, you are consenting to our use of cookies.

Potentiometer Questions Started by norbss Yesterday at 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. The IC has three basic sections, a trip amp, a charge pump and an op amp, if the charge pump and following integrator can’t be set to the desired time constant then the op amp can give lots of gain. Can any professional ln2907n me a design which can achive a higher range of output, e.

National Semiconductor Electronic Components Datasheet. This version is lm290n suited for single. Don’t worry about calculating the R1,C1,C2 values.

National Semiconductor

Also, I need to be very conservative wrt adding components. This feature allows either a ground or supply referred load of up to 50 mA. Articles Top Articles Search resources.

Welcome to our site! Frequency to Voltage Converter.