This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM393: TINA Simulation of device allows for input value higher than specified input common mode voltage range

Part Number: LM393

Hello,

I have a customer who asked:

Common mode for either input should not exceed V+-1.5V.

We came across a state in our circuits, that one of the input may cross this threshold of V+-1.5V.

Can TI guarantee that the comparator will still work properly in this condition (one of the input voltages is above the requirement of V+-1.5V)?

I looked in the data sheet and it also specifies that the input voltage also follows this rule of V+-1.5V. 

Can you provide help please?

Louie

  • Hello Louie,

    TI will not "guarantee" any functionality that that exceeds a specified datasheet limit. We can offer guidance and expected behavior, but a proper design should not exceed the datasheet specifications.

    However, in section 8.2.2.1 of the apps section, it does mention the expected behavior should *one* of the inputs exceed the common mode limit. Basically, as long as ONE of the inputs is within the limits, the output is expected to be correct (but not guaranteed).