35.17 ADC

Table 35-23. Power Supply, Reference and Input Range
Operating conditions: V_DD = 3.0V T_A = 25°C Applies to all allowed combinations of V_REF selections and sample rates, unless otherwise specified
Symbol	Description	Min.	Typ.✝	Max.	Unit	Conditions
V_DD	Supply voltage	1.62	—	5.5	V
V_REF	Reference voltage	0.512	—	V_DD	V
C_IN	Input capacitance	—	3	—	pF
R_IN	Input resistance	—	3	—	kΩ
V_IN	Input voltage range	0	—	V_REF	V
✝ Data in the “Typ.” column is measured at T_A = 25°C and V_DD = 3.0V unless otherwise specified. These parameters are not tested and are for design guidance only.

Table 35-24. Clock and Timing Characteristics
Operating conditions: Applies to all allowed combinations of V_REF selections and sample rates, unless otherwise specified
Symbol	Description	Min.	Typ.✝	Max.	Unit	Conditions
CLK_ADC	ADC clock frequency	300	—	2000	kHz	REFSEL = Internal Reference
CLK_ADC	ADC clock frequency	300	—	2000	kHz	REFSEL = External Reference REFSEL = V_DD
✝ Data in the “Typ.” column is measured at T_A = 25°C and V_DD = 3.0V unless otherwise specified. These parameters are not tested and are for design guidance only.

Table 35-25. Accuracy Characteristics ⁽¹⁾
Operating conditions: V_DD = 3.0V V_REF = External 3.0V T_A = 25°C f_{CLK_ADC} = 1 MHz CPU in Sleep mode
Symbol	Description	Min.	Typ.✝	Max.	Unit	Conditions
Res	Resolution	—	—	10	bit
E_INL	Integral nonlinearity error	—	0.3	—	LSb
E_DNL	Differential nonlinearity error	—	0.3	—	LSb
E_OFF	Offset error	—	0.3	—	LSb
E_GAIN	Gain error	—	2	—	LSb
E_T	Total unadjusted error	—	3.5	—	LSb
✝ Data in the “Typ.” column is measured at T_A = 25°C and V_DD = 3.0V unless otherwise specified. These parameters are not tested and are for design guidance only. Note: These values are based on characterization and are not covered by production test limits.