In this thread:
https://forum.allaboutcircuits.com/threads/creating-negative-rail-supply-with-op-amps.142170/
a. I missed all the fun.
b. The TS is partly not at fault because of an "error" in the LM358 datasheet. The package pinout drawings have pin 4 (the negative rail pin) labeled as GND. This has created confusion in several threads over the years.
The language and attitude (all of which I can only infer) notwithstanding, it doesn't surprise me that an inexperienced person would think that one of the characteristics of a single-supply opamp is that they take care of the negative rail bias internally. Especially since some parts actually do that.
The LM358 has a non-traditional input stage (for its time) and runs with only one power rail better than many of its contemporaries. BUT it is a traditional opamp in most respects, and will run just fine with bipolar power supplies.
ak
https://forum.allaboutcircuits.com/threads/creating-negative-rail-supply-with-op-amps.142170/
a. I missed all the fun.
b. The TS is partly not at fault because of an "error" in the LM358 datasheet. The package pinout drawings have pin 4 (the negative rail pin) labeled as GND. This has created confusion in several threads over the years.
The language and attitude (all of which I can only infer) notwithstanding, it doesn't surprise me that an inexperienced person would think that one of the characteristics of a single-supply opamp is that they take care of the negative rail bias internally. Especially since some parts actually do that.
The LM358 has a non-traditional input stage (for its time) and runs with only one power rail better than many of its contemporaries. BUT it is a traditional opamp in most respects, and will run just fine with bipolar power supplies.
ak