LM2903N DATASHEET PDF

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Can you describe what you mean by “invert the inputs” by editing your question, please?

Can anyone help me come up with ideas to try and get this working? Sign up using Facebook. I will look into your question.

Also, thanks for the 10K resistor idea that got the voltage down to what I was hoping to see. You need a pullup resistor. Matthew Tubbs 5 1. I am using a LMN to learn about comparators.

LMN Datasheet(PDF) – NXP Semiconductors

I mistakenly thought the inverted its output. The LM has an open collector output so it can not actively drive a positive voltage. Thanks for the drawings. I looked over the datasheet for 3 days and didn’t see the typical application. Just for grins – since you want to learn about comparators – it might be fun to take a look at the two circuits below and figure out why VOUT2 switches and VOUT1 doesn’t, even though VIN is the same input to both circuits.

The LM has an open-collector output. They helped a lot. For a better handle on what’s going on with an LM, take a datasheett look at the data sheetparticularly at Figure 3. In general, inputs come from the left and the top of the drawing, and outputs go out the bottom and the right, kinda like this, after adding the pullup to the comparator’s output: You might want to try making your drawings easier to read, since that makes it much easier for us to follow the circuit’s ins and outs.

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After I get my desired voltage out of my Comparator, how do I stabilize it so that I datasheeet use it on a load? Why is this happening.

Left click on the graphic to make it go full-screen and, by the way, here’s the LTspice circuit list just in case you want to play with the circuit s: My wiring diagram looks similar to this picture I created in LTspice. In general, inputs come from the left and the top of the drawing, and outputs go out the bottom and the right, kinda like this, after adding the pullup lm9203n the comparator’s output:.

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Reading the datasheet would have quickly cleared this up, there’s even a nice “typical application” schematic. Sign up or log in Sign up using Google.

Say I want to use the 12v Vout to make my horn go off on my car. The horn is about 15 ohms. Since your original question has been dealt with to your satisfaction, it’s done with. Unfortunately, that ohm pullup I showed is more than likely causing the problem, and it should be more like 10k for an LM Datahseet up using Email and Password.

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Steve G 4, 1 7 However, when I check the output the resulting voltage is 0v. Post as a guest Name. You’ll never get 0V out with GND equal to zero volts, no matter what, because of the saturation resistance of the comparator’s output transistor. After testing the pull up resistor, I am left wondering when I invert the inputs I do not get 0v like I was expecting.

By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Comparator help LmN Ask Question. One more question thought please? Thank you for pointing this out and I will go back over the dataseet to get a better understanding of how to read it.

LM2903N Datasheet

Email Required, but never shown. You need to add a pull-up resistor of about datashest between the output pin and your positive supply rail. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.