Hello , I am using the TLV3701. In the datasheet below they say that they only have GND port.
But in the simulation i put -12V instead of GND and the comprator worked fine.
Can i put +12V -12V for this type of the comparator given the datatsheet?
Thanks.

https://www.ti.com/lit/ds/symlink/tlv3701.pdf?ts=1727697533187&ref_url=https%3A%2F%2Fwww.ti.com%2Fproduct%2FTLV3701

 

One huge benefit of a simulator over reality is that parts never burn up.
Look at the rest of the data sheet, including the ABSOLUTE MAXIMUM VOLTAGE section, and the power supply section.
The rest of the specifications sheet provides a whole lot of useful and even important information.
Section 8.3 of the spec sheet states that it can be used with a split supply.

 

Hello ,the datasheet say Vcc is 17V. my negative voltage input is 4V and positive input is 0V.
If i put in the comparator Vcc=12V and GND=-12V so it will be 24V?
So it will burn the component?
Any alternatives i can find?
Thanks.

 

Hello ,the datasheet say Vcc is 17V. my negative voltage input is 4V and positive input is 0V.
If i put in the comparator Vcc=12V and GND=-12V so it will be 24V?
So it will burn the component?
Any alternatives i can find?
Thanks.


View attachment 332764

You could try a TVL1811 or TVL1821. They can take + and - 20V, or 40V single supply.

 

there is no such components according to google

 

there is no such components according to google

Sorry, I meant TLV1811 or 1821.

 

For the positive supply you could use a 5 volt Zener diode and a resistor to provide + 5, and along with the minus 4 volts that should work quite well.

 

Hello sarahMCML,my comprator backly needs to pass M12 signal which is 0 to -12V pulse.
positive input is GND, negative input is 4V.
I have placed a spice model of these components and they both gave me a spike of +12V.
When I put RB060MM-30 diode it canceled this spike .
Is it a good solution?
Thanks.
LTspice are attached.

 

Hello ,the datasheet say Vcc is 17V. my negative voltage input is 4V and positive input is 0V.
If i put in the comparator Vcc=12V and GND=-12V so it will be 24V?
So it will burn the component?
Any alternatives i can find?
Thanks.


View attachment 332764

The absolute max voltage is the highest voltage at which the chip will operate as specified. What it does with a higher voltage is unspecified. It might burn up, it might shut down to protect itself, or it might just operate less precisely. That said, I would not expect the chip to survive for long with 24V when the max was 17, whereas I would expect it to operate normally at 17.1V.

 

Hello Bob, In post 8 when i answered to the good suggestion of SarahMCML, I got an undesired spike of 12V from the model I was suggested.I canceled this spike with RB060MM-30 shotky diode.
Is it a good solution?In the simulation it works.
I upladed the full LTSPICE file in post 8.
Thanks.

 

Hello sarahMCML,my comprator backly needs to pass M12 signal which is 0 to -12V pulse.
positive input is GND, negative input is 4V.
I have placed a spice model of these components and they both gave me a spike of +12V.
When I put RB060MM-30 diode it canceled this spike .
Is it a good solution?
Thanks.
LTspice are attached.
View attachment 332773

View attachment 332775

It may not make any difference to your Spice model, but the TLV1821 is an Open Drain output comparator, whereas your original TLV3701 is push-pull output. You need the TLV1811 version, possibly. Or a pull-up resistor on the TLV1821's output!