STM32F303CCT6 OpAmp in STANDALONE mode, gain very low.

[JAlca]

Hi all!,

I have a electret microphone amplifier (see attached). The circuit works fine with a LM-358, but when I use the internal opamp from a STM32F303, the gain is very low.

I use the STM32 opamp in STANDALONE mode. Is ther something I'm missing?

I generate the code, from CubeIDE, and then launch the program. Does it works like a normal OpAmp? I mean if I need to do something inside the program, or just the

static void MX_OPAMP1_Init(void);

generated from the CubeIDE?