EFM32ZG222 Datasheet, PDF (37/70 Pages) Silicon image – Energy, gas, water and smart metering

...the world's most energy friendly microcontrollers
3.10.1 Typical performance
Figure 3.28. ADC Frequency Spectrum, Vdd = 3V, Temp = 25°C
1.25V Reference
2.5V Reference
2XVDDVSS Reference
5VDIFF Reference
VDD Reference
2015-03-06 - EFM32ZG222FXX - d0066_Rev1.10
37
www.silabs.com