66.9.5 ADC Electrical Characteristics

Table 66-34. ADC INL and DNL, VADVREF = 3.3V
Symbol Parameter Conditions Min Typ Max Unit
Differential Mode
INL Integral Non-Linearity 1 1 LSB
DNL Differential Non-Linearity 1 1 LSB
Single-Ended Mode
INL Integral Non-Linearity 1.5 1.5 LSB
DNL Differential Non-Linearity 1 1 LSB
Table 66-35. ADC Offset and Gain Error, VADVREF = 3.3V
Symbol Parameter Conditions Min Typ Max Unit
Differential Mode
EO Differential Offset Error -2.0 2.0 LSB
EG Differential Gain Error -0.2 0.2 %
Single-Ended Mode
EO Single-ended Offset Error -2.0 2.0 LSB
EG Single-ended Gain Error -0.2 0.2 %
Table 66-36. ADC Analog Input Characteristics
Symbol Parameter Conditions Min Typ Max Unit
VFS Analog Input Full Scale Range(1) ADC_COR.DIFFx = 0 0 VADVREF V
ADC_COR.DIFFx = 1 -VADVREF VADVREF
VINCM Common Mode input range(2) ADC_COR.DIFFx = 1 0.4 × VDDANA 0.6 × VDDANA V
CIN ADC sampling capacitance 3 pF
CP_ADx Analog input parasitic capacitance(4) ADx pin configured as analog input 10
ZIN Common Mode Input impedance(3) On ADx pin 1 / (fS × CP_ADx) Ω
Note:
  1. VFS = VADx in Single-ended mode, VFS = (VADx - VADx+1) in Differential mode.
  2. VINCM = (VADx + VADx+1) / 2.
  3. See the figure "Input Channel Model". When converting one single channel, most of the input parasitic capacitance in not switched, therefore the common mode input impedance reduces to ZIN = 1 / (fS × CIN).
  4. Includes CIN.