LMN Datasheet, LMN National Semiconductor Voltage Comparator Datasheet, buy LMN. The LM, LM, LM are voltage comparators that have low input currents. They are also designed to operate over a wide range of. Part, LMN. Category. Description, Voltage Comparators. Company, ST Microelectronics, Inc. Datasheet, Download LMN datasheet. Cross ref.
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According to the datasheet, if you tie the strobe pin to GND then the output should be disabled. Message 4 of 5.
An Emitter Output Circuit is shown below. A sample circuit is shown below in which the Inverting Terminal is set to 2. LMN Comparator with Strobe.
Could the component model be the issue? The problem is that tying the strobe pin to ground should lj311n the output stop changing, and it isn’t.
LMN STMicroelectronics | Ciiva
You can refer the other possible circuits from the LM datasheet given at bottom. I just built the circuit in real life and it works exactly as I thought, putting GND on datqsheet strobe pin makes the output a constant state at Vcci. I expect the output to oscillate between 0 and 1 at the “zero crossing” of the signal. The output is correct as seen on the scope.
Message 3 of 5. Message 2 of 5. Any Op-Amp can be made to work as a voltage comparator, but the LM proves itself to be advantages by housing an Output Transistor inside its package.
If the voltage at lm311m Non-Inverting Terminal pin 2 is higher than the Inverting Terminal pin 2the output pin 7 will also be high else the output will be low. TL dstasheet Programmable Reference Voltage. The transistor can also make the Load to be isolated from the system ground, so if you are looking for a Voltage comparator to drive loads of these specifications then this IC might be the right choice for you. Most Active Software Boards: You can note that the Output voltage stays high when pin 2 has higher voltage than pin 7 and vice versa.
When not in use the pins 5 and 6 should be shorted as shown above.
LM Datasheet and Product Info | Analog Devices
Attached is a Multisim file with every comparator with a strobe feature available in Multisim and a picture of the circuit. The simplified schematics of the IC is shown below: This pin is connected to the ground of the system Negative voltage can also be used.
Message 1 of 5. I built a simple circuit using the LMN comparator. The pins 5 and 6 on the Op-amp are used to set the balance voltage if you want to manually adjust the DC-Offset voltage. As grounding unused pins is a practice on electronics, I guess it was the way of the designer to make sure the lk311n was not disabled for a ground wired to that pin.
I tried adding in a transistor with a 1k resistor to ground and a TTL signal at the base as per the datasheet and this doesn’t disable the output either. The problem is that the strobe pin is not working for the model. Normally these pins are not used since the Input Offset itself is much better controlled.
Any help is appreciated. Auto-suggest helps dqtasheet quickly narrow down your search results by suggesting possible matches as you type. The simplified schematics of the IC is shown below:.
Message 5 of 5.
Multisim and Ultiboard
The LM can work on a Single supply voltage or in a dual supply mode. Submitted by admin on 6 March All of those comparator outputs should be a high state which means the LED will turn on connected through the 1K resistor to Vcc. Why datashdet it not working in Multisim?