EFM32GG232 Datasheet, PDF (41/71 Pages) Silicon Laboratories – High Performance 32-bit processor

...the world's most energy friendly microcontrollers
Figure 3.27. OPAMP Negative Power Supply Rejection Ratio
Figure 3.28. OPAMP Voltage Noise Spectral Density (Unity Gain) V_out=1V
Figure 3.29. OPAMP Voltage Noise Spectral Density (Non-Unity Gain)
2016-03-21 - EFM32GG232FXX - d0125_Rev1.40
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