<angus.oliver@[EMAIL PROTECTED]
> wrote in message
news:11cf7b47-7d56-412a-99c8-f738cd2936b9@[EMAIL PROTECTED]
> Hi All,
>
> Having found dual op amp packages around a fifth the price of
> comparable single packages from online distributors, I think i'll go
> for the double.
> (BTW, I'm using supply of +16, and ground).
>
> I don't want the unused channel drawing current unnecessarily though,
> or bouncing the output around.. - If I tie the non-inverting input to
> +3.3V, and have a high resistance feedback resistor to the inverting
> input (with no other input to that pin), would that be as good as
> anything? I figure the output won't have to 'try' very hard to modify
> the voltage of an input pin with no other voltages on it..
>
> Am I right?
>
> Thanks..
Just tie the inverting input to the output, unity gain. Three point three
volts on the noninverting input is OK. You can usually just ground this
point, in this case connecting it to the negative rail. Ideally the common
mode range of the input should include the negative rail but that may not
be
necessary depending on the particular amp.
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