43.9 Internal Voltage Reference Specifications

Table 43-12. Internal Voltage Reference Electrical Specifications
DC CHARACTERISTICS			Standard Operating Conditions: VDD and VDDIO 2.7V to 5.5V (unless otherwise stated) Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial
Param. No.	Symbol	Characteristics	Min.	Typical ⁽¹⁾	Max.	Units	Conditions
VR_1	IREF^(2,3)	Internal Voltage Reference ADC.REFCTRL.REFSEL = INTREF DAC.CTRLB.REFSEL = INTREF SDADC.REFCTRL.REFSEL = INTREF	3.992	4.096	4.164	V	VDDANA(min) ≥ INTERNAL Voltage VREF.SEL = 3
VR_9	ACIREF⁽⁴⁾	Internal Voltage Reference Comparator AC.COMPCTRLn.MUXNEG = INTREF	3.992	4.096	4.164	V	VREF.SEL = 3
VR_11			1.996	2.048	2.082	V	VREF.SEL = 2
VR_13			0.998	1.024	1.041	V	VREF.SEL = 0
VR_25	TDRIFT	Internal Voltage Reference Temperature Drift	-0.019	-	0.006	%/°C	Over [-40, +25]°C
VR_25	TDRIFT	Internal Voltage Reference Temperature Drift	-0.002	-	0.009	%/°C	Over [+25, +85]°C
VR_27	VDRIFT	Internal Voltage Reference Voltage Drift	-0.111	-	0.252	%/V	Over full operating voltage range
Note: Typical values at 25°C only. ADC, DAC, SDADC Internal Voltage Reference voltage 2.4V ≤ IREF ≤ VDDANA. ADC, DAC, SDADC reference voltages < 2.4V, (i.e. < 500µV/step), is not practical and peripheral performance is not guaranteed. Comparator Ref voltage cannot exceed (VIN(max)-VIOFF(max)-200mV) ≥ CMP VREF ≥ (VIN(min)+VIOFF(min)+200mV) (i.e. VIN = Parameter CMP_4, VIOFF = Parameter CMP_1).