51.13 Internal Voltage Reference Electrical Specifications

Table 51-17. Internal Voltage Reference DC Electrical Specifications
DC CHARACTERISTICSStandard Operating Conditions: VDDREG=VDDIO=AVDD 1.71V to 3.63V (unless otherwise stated)

Operating temperature:

-40°C ≤ TA ≤ +85°C for Industrial

Param. No.SymbolCharacteristicsMin.Typ. (1)Max.UnitsConditions
VR_1IVREF ADC Internal Analog Channel Voltage1.1681.2001.223VADC.CTRLB.ADCHSEL = 1.2V IVREF
VR_9ACIREF (2)Internal Comparator Voltage Reference 0.7870.80.84VAC.COMPCTRLn.MUXNEG = Bandgap
VR_25TDRIFTInternal Voltage Reference Temperature Drift0.34%/°COver full operating temperature range
VR_27VDRIFTInternal Voltage Reference Voltage Drift2.328%/VOver full operating voltage range
Note:
  1. Typical values at 25°C.
  2. See parameter CMP_23 for Comparator Ref voltage range information.