M
MRW
- Jan 1, 1970
- 0
Hi all. I remember posting a question before regarding leaving opamp
inputs open. From what I read, the inputs should be connected to ground
or some voltage source to have some meaningful output.
So, if I used an IC with 4 opamps and only utilized 2 of them, does
that mean that I have to ground the inputs of the other two and just
leave the output open? Or do I connect the unused opamp output to a
grounded resistor?
.... or do I connect the unused opamp inputs together to insure that
both inputs have the same voltage? Or do I just configure the unused
opamps as voltage followers?
My gut feeling is that I should connect the inputs of the unused opamps
together to make sure that they have the same voltage. I think that if
I don't, then noise might turn the output on and off and maybe "eat" up
on the voltage source.
--
inputs open. From what I read, the inputs should be connected to ground
or some voltage source to have some meaningful output.
So, if I used an IC with 4 opamps and only utilized 2 of them, does
that mean that I have to ground the inputs of the other two and just
leave the output open? Or do I connect the unused opamp output to a
grounded resistor?
.... or do I connect the unused opamp inputs together to insure that
both inputs have the same voltage? Or do I just configure the unused
opamps as voltage followers?
My gut feeling is that I should connect the inputs of the unused opamps
together to make sure that they have the same voltage. I think that if
I don't, then noise might turn the output on and off and maybe "eat" up
on the voltage source.
--