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LM139A-MIL

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SLCS161 – JUNE 2017

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

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

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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

8.2.2.2 Minimum Overdrive Voltage

Overdrive voltage is the differential voltage produced between the positive and negative inputs of the comparator

response time decreasing with increasing overdrive. Figure 8 and Figure 9 show positive and negative response

times with respect to overdrive voltage.

8.2.2.3 Output and Drive Current

Output current is determined by the load and pullup resistance and logic and pullup voltage. The output current

The output current can also effect the transient response.

8.2.2.4 Response Time

Response time is a function of input over-drive. See the Typical Characteristics graphs for typical response

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