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  • TI Thinks Resolved

LM239: LM239 common mode input voltage range

Prodigy 170 points

Replies: 2

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Part Number: LM239

Good morning,

What about the input common mode range of the comparator LM239.. It is valid what the datasheet says about out of range at page 13?:

The following list describes the outcomes of some input voltage situations.

• When both IN– and IN+ are both within the common-mode range:

– If IN– is higher than IN+ and the offset voltage, the output is low and the output transistor is sinking

current

– If IN– is lower than IN+ and the offset voltage, the output is high impedance and the output transistor is

not conducting

When IN– is higher than common mode and IN+ is within common mode, the output is low and the output

transistor is sinking current

• When IN+ is higher than common mode and IN– is within common mode, the output is high impedance and

the output transistor is not conducting

• When IN– and IN+ are both higher than common mode, the output is low and the output transistor is sinking

current

Thank you..

  • Hi Roger,

    please don't open a new thread. This merely results in total confusion.

    e2e.ti.com/.../779018

    Kai
  • In reply to kai klaas69:

    Roger
    Since there has been no further discussion on this thread, I am closing it. If more support is required, please hit Reply and the thread will be re-opened.
    Chuck

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