44.4.6 Analog-to-Digital Converter (ADC) Accuracy Specifications

Table 44-12.
Standard Operating Conditions (unless otherwise stated) V_DD = 3.0V, T_A = 25°C, T_AD = 1 μs, F_OSC ≤ 8 MHz, ADC_VREF = V_DD/V_SS, Differential Mode
Param No.	Sym.	Characteristic	Min.	Typ. †	Max.	Units	Conditions
AD01	N_R	Resolution	—	—	12	bit
AD02*	E_IL	Integral Nonlinearity Error	-6.0	±0.5	+6.0	LSb	ADC_REF+ = 3.0V, ADC_REF- = 0V
AD03	E_DL	Differential Nonlinearity Error	-1.0	±0.5	+2.5	LSb	ADC_REF+ = 3.0V, ADC_REF- = 0V
AD04	E_OFF	Offset Error	-11.5	3.0	+11.5	LSb	ADC_REF+ = 3.0V, ADC_REF- = 0V
AD05	E_GN	Gain Error	-4.0	±1.0	+4.0	LSb	ADC_REF+ = 3.0V, ADC_REF- = 0V
AD06*	V_ADREF	ADC Reference Voltage (AD_REF+ - AD_REF-)	1.8	—	V_DD	V
AD07*	V_AIN	Full-Scale Range	AD_REF-	—	AD_REF+	V
AD08*	Z_AIN	Recommended Impedance of Analog Voltage Source	—	1.0	—	kΩ
AD09*	R_VREF	ADC Voltage Reference Ladder Impedance⁽²⁾	—	50	—	kΩ
AD10*	E_ABS	Absolute Error⁽¹⁾
† Data in “Typ” column is at 3.0V, 25°C unless otherwise stated. * These parameters are characterized but not tested. Note: Total Absolute Error is the sum of the offset, gain and integral nonlinearity (INL) errors. This is the impedance seen by the V_REF pads when the external reference pads are selected.