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EFM32WG880 Datasheet, PDF (46/85 Pages) Silicon Laboratories – Operation from backup battery when main power drains out
...the world's most energy friendly microcontrollers
Figure 3.34. OPAMP Negative Power Supply Rejection Ratio
Figure 3.35. OPAMP Voltage Noise Spectral Density (Unity Gain) Vout=1V
Figure 3.36. OPAMP Voltage Noise Spectral Density (Non-Unity Gain)
2014-06-13 - EFM32WG880FXX - d0197_Rev1.40
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