LM2903: LM2903PWRG4, LM2903PWR, LM2903BIPWR

MITHRA A

Prodigy 10 points

Part Number: LM2903

We are planning to use these parts LM2903PWRG4, LM2903PWR, LM2903BIPWR in our projects.

We need below information, can you please provide.

When one of the input goes below zero or negative, what is the output state?

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 276980 points

See section 2.9 of the LM339 application note. In short, this exceeds the absolute maximum ratings, and can damage the device. The output state is undefined.

0 Paul Grohe over 1 year ago

TI__Guru 53316 points

As Clemens stated, the output can invert or randomly change state when an input is forced below ground (-0.4V or more) - even if there is still a large differential input voltage.

To drive the input that far below ground requires a lot of current(>50mA) - that is not normal operating conditions.

Per the appnote, if negative voltages are expected, a series current limiting resistor and external clamp diode are recommended.

Amplifiers

Amplifiers forum

LM2903: LM2903PWRG4, LM2903PWR, LM2903BIPWR