The LM, LM, and LM devices are single high-speed voltage comparators. High-Reliability Automotive Applications; Configuration Control and Print. NOTE: Page numbers for previous revisions may differ from page numbers in .. A typical LMMIL application compares a single signal to a. Circuit Description. FIGURE 1. Simplified Schematic of the Comparator. National Semiconductor. Application Note Robert J. Widlar. October

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Menu Products Explore our product portfolio. Media New media New comments Search media. Is there something obvious about this chip that I am not aware of that would be the problem? Comparator output Like many comparators, the LM has an open collector output. Distributor Name Region Stock Min.

Problem with LM voltage comparator | Electronics Forum (Circuits, Projects and Microcontrollers)

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Thread starter Strablan Start date Dec 16, This site uses cookies to help personalise content, tailor your experience and to keep you a;plication in if you register.

Welcome to our site! Thanks for your patience. Dear all Can’t get an LM comparator to work as it appears it should – probably something obvious but due to ignorance on my part a;plication I cant see it. You must log in or register to reply here. IoT for Smart Things.

Pioneer Elite vsxtx water damage no power Started by Watin 53 minutes ago Replies: Selectors Simulators and Models. What does precision mean for an op amp? Strablan New Member Dec 16, Key Features Output current: Buy Direct Add to cart. Strablan New Member Dec 18, Strablan New Member Dec 24, Have a look at any textbook on negative feedback or search the web.

Media Subscription Media Contacts. In your case because of the resistor in the line for pin 3 it goes high turning of the LED.

Problem with LM311 voltage comparator

And that the 47k resistor by led needs to be replaced by one of approx ohms? Limited Engineering samples available Preview: Cant get pin 7 to turn on though.


You need to reduce the gain of the circuit using Feedback. Hope this helps Sandyw.

LM – Voltage comparator with strobe – STMicroelectronics

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Have hooked it up as follows: Does the voltage for the reference input pin pin 2 or 3 need to be approximately half that supplied to pin 8? I have attached a diagram of what I am trying to do, hopefully you will be able to see where I am going wrong Again, many thanks. Did you tie a pullup resistor try 10K to VCC on pin 7?

Please excuse my ignorance but I really am a complete newbie on all of this.