So I have a design with an input signal (steady) between 0 and 300mV. I wish to scale this signal up to 0-10VDC.
I bought an Op Amp called a MC33202
This did the trick and worked fine but was expensive.
On a second iteration of the design, I found a cheaper alternative to that op amp called a TL082CP
This was way way cheaper, but when hooked up to the same circuit, it outputs too high, it maxes out at the top rail voltage.
My Op amp is hooked up with one rail at 0 Volts, the other rail at 10 volts. Input goes into the +, the - is tied to the Vout and I have non inverting gain.
The only difference I see is that the non working op amp is a Jfet amp, whatever that is, the first op amp is a "rail to rail"
Why doesn't the cheaper op amp work???? I wish to learn what I did wrong.