35.12 VREF

Table 35-16. V_REF Specifications
Standard Operating conditions: T_A = -40°C to +125°C (unless otherwise specified)
Symbol	Description	Min.	Typ.✝	Max.	Unit	Conditions
VDD_{VREF_0V512}	V_DD for ADC internal VREF 0.512V	1.62	—	5.5	V
VDD_{VREF_1V024}	V_DD for AC/ADC internal VREF 1.024V	1.62	—	5.5	V
VDD_{VREF_2V048}	V_DD for AC/ADC internal VREF 2.048V	2.55	—	5.5	V
VDD_{VREF_4V096}	V_DD for AC/ADC internal VREF 4.096V	4.6	—	5.5	V
VDD_{VREF_2V5}	V_DD for AC/ADC internal VREF 2.5V	3.0	—	5.5	V
VREF_0V512	ADC Internal reference 0.512V	—	0.512	—	V
VREF_1V024	AC/ADC Internal reference 1.024V	—	1.024	—	V
VREF_2V048	AC/ADC Internal reference 2.048V	—	2.048	—	V
VREF_4V096	AC/ADC Internal reference 4.096V	—	4.096	—	V
VREF_2V5	AC/ADC Internal reference 2.5V	—	2.5	—	V
V_{VREF_0V512}⁽¹⁾	ADC Internal voltage reference 0.512V	-1	—	1	%	T_A = 25°C
V_{VREF_0V512}⁽¹⁾	ADC Internal voltage reference 0.512V	-2	—	2	%
V_{VREF_1V024}⁽¹⁾	ADC Internal voltage reference 1.024V	-1	—	1	%	T_A = 25°C
V_{VREF_1V024}⁽¹⁾	ADC Internal voltage reference 1.024V	-2	—	2	%
V_{VREF_2V048}⁽¹⁾	ADC Internal voltage reference 2.048V	-1	—	1	%	T_A = 25°C
V_{VREF_2V048}⁽¹⁾	ADC Internal voltage reference 2.048V	-2	—	2	%
V_{VREF_4V096}⁽¹⁾	ADC Internal voltage reference 4.096V	-1	—	1	%	T_A = 25°C
V_{VREF_4V096}⁽¹⁾	ADC Internal voltage reference 4.096V	-2	—	2	%
V_{VREF_2V5}⁽¹⁾	ADC Internal voltage reference 2.5V	-1	—	1	%	T_A = 25°C
V_{VREF_2V5}⁽¹⁾	ADC Internal voltage reference 2.5V	-2	—	2	%
V_{VREF_1V024}⁽¹⁾	AC Internal voltage reference 1.024V	-2	—	2	%
V_{VREF_2V048}⁽¹⁾	AC Internal voltage reference 2.048V	-2	—	2	%
V_{VREF_4V096}⁽¹⁾	AC Internal voltage reference 4.096V	-2	—	2	%
V_{VREF_2V5}⁽¹⁾	AC Internal voltage reference 2.5V	-2	—	2	%
t_{VREF_ST} *	Internal VREF Start-up Time	—	< 130	—	μs
V_EXTVREF0	VREFA external reference input pin voltage	1.024	—	V_DD	V
✝ Data in the “Typ.” column is at T_A = 25°C and V_DD = 3.0V unless otherwise specified. These parameters are not tested and are for design guidance only. * These parameters are characterized but not tested in production. Note: The V_{VREF_xVxxx} symbol refers to the respective values of the REFSEL bit fields in the ADC0.CTRLC and VREF.AC0REF registers.