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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By continuing to use this site, you are consenting to our use of cookies. This is important as the input signal MUST cross this zero volt threshold:!: I don’t know why. Click here to register now.

Design Frequency to Voltage Circuit of LM2907N

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. Thank you a lot. So, can you give me any advice about the accuracy of the circuit? Other than that you said the circuit worked, just gave the wrong rangethe diagram you posted is correct, the vaues should be OK. I have made the circuit but seem not work. But i want to know the accuracy of this circuit?

Klaus New Member Jul 3, Thank you for your reply. 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.


You can then drive the transistor to give you an output of up to Vcc. Don’t worry about calculating the R1,C1,C2 values. The two basic configurations offered include an 8-pin device. 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.

Can any professional give me a design which can achive a higher range of output, e. Now Dataheet understand the chip gives you a 0volts to Vcc variation for 0 Hz to fmax. 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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But I need 10khz to 40khz give me a 0 volt – Vcc variation. Also, I need to be very conservative wrt adding components. To participate you need to register.

Electro Tech is an online community with overmembers who enjoy talking about and building electronic dwtasheet, projects and gadgets. The more versatile configurations provide differential ta- chometer input and uncommitted op amp inputs. National Semiconductor Electronic Components Datasheet. Welcome to our site! The input signal must therefore go positive AND negative for the circuit to work.


National Semiconductor – datasheet pdf

Articles Top Articles Search resources. I’m trying to sense the freq of a square wave from 10KHz – 40KHz range. Sorry, can you give me any advice of which type can do such thing?

The 8 pin package has the op-amp input stage’s inverting input connected to ground via pin 8the non-inverting input is on pin 1. I am before use the below circuit and it work.

As i read from d’sheet it can’t do this. Replacement Transformer Started by ncag 47 minutes ago Replies: Media New media New comments Search media. Also, the ripple of the output will affect the output range or not?

Both of these configurations are available with an active. The two basic dataeheet 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.

Potentiometer Questions Started by norbss Yesterday at