NXP Semiconductors MPC5746R - SAR ADC

11.2 SAR ADC
The device provides a 12-bit Successive Approximation Register (SAR) Analog-to-
Digital Converter.
(2
)
(1)
(3
)
(4)
(5)
Offset Error OSE
Offset Error OSE
Gain Error GE
1 LSB (ideal)
V
in(A)
(LSB
ideal
)
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) Differential non-linearity error (DNL)
(4) Integral non-linearity error (INL)
(5) Center of a step of the actual transfer
curve
code out
4095
4094
4093
4092
4091
4090
5
4
3
2
1
0
7
6
1 2 3 4 5 6 7 4089 4090 4091 4092 4093 4094 4095
1 LSB ideal =(VrefH-VrefL)/ 4096 =
3.3V/ 4096 = 0.806 mV
Total Unadjusted Error
TUE = +/- 6 LSB = +/- 4.84mV
Figure 10. ADC characteristics and error definitions
ADC modules
SPC5746R Microcontroller Data Sheet, Rev. 6, 06/2017
NXP Semiconductors 27