LM119QML-SP: GND pin current when output is off (pulled high)?

Frank Celizic

Prodigy 20 points

Part Number: LM119QML-SP
Other Parts Discussed in Thread: LM119

What is the current flowing out the GND pin when the output is off (pulled high)?

I assume some current flows to bias the internal circuits of the LM119 from V+ to the GND pin?

I am using the LM119 in a manner that the current flowing out of the GND pin impacts other circuits.

The V+ to GND pin potential is ~ 4V and the V+ to V- bias is ~6V.

Thanks

over 7 years ago

0 Kirby Kruckmeyer96848 over 7 years ago

TI__Genius 17085 points

Hello Frank,
As I understand your condistions:
V+ = +4V
V- = -2V

We see a ground current of 1.8 mA.

If that answers your question, please check verify answer, otherwise can you provide more details.

0 Frank Celizic over 7 years ago in reply to Kirby Kruckmeyer96848

Prodigy 20 points

V+ is 0V (signal ground). V- is about -6V. We are not connecting GND pin to V-.

But based on your response, it looks like the supply current flows through the GND pins, and not from V+ to V-?

0 Kirby Kruckmeyer96848 over 7 years ago in reply to Frank Celizic

TI__Genius 17085 points

That is correct.

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LM119QML-SP: GND pin current when output is off (pulled high)?