I've never worked with opamps before, so I started reading some books and one of the first application circuits with opamps is the voltage follower or buffer, to have an output signal with the same amplitude as the input. I overlooked the part that says the recommended input voltage, for my setup, would be 2V (I only looked at the absolute maximum ratings, that is VCC- -0.5 and VCC+ +0.5 if I'm not wrong) so I understand that a different opamp, with different ratings and input voltages, would be needed if one wanted to create a voltage follower with a wider input range that could be used for digital signals at 0 and 5V, right?I don't know what you want to achieve
Signals close to the rails are typical for CMOS logic signals. Maybe you don't need an Opamp at all.
I got it from Mouser, and I think it shows the TI logo, but I'm not sure how could I check if it is genuine or not. By the way, in the datasheet, I could read in the first page that the supply voltage was "±2.25 V to ±20 V, 4.5 V to 40 V". Where could you see this reference to the 8V supply voltage?TL072 isn't known to show gain reversal, also the simulated buffer has monotonic behaviour. In so far the results in post #1 are not entirely plausible. I wonder if its a genuine TI part. It should be however mentioned that the datasheet doesn't cover behaviour below 8V supply voltage.
An Opamp isn't designed for digital signals at all. Neither input, nor output. They are designed for analog input and analog output.I understand that a different opamp, with different ratings and input voltages, would be needed if one wanted to create a voltage follower with a wider input range that could be used for digital signals at 0 and 5V, right?
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