MC3S12RG128 Datasheet, PDF (520/546 Pages) Freescale Semiconductor, Inc – Microcontrollers

Appendix A Electrical Characteristics
1 _{These values include quantization error which is inherently 1/2 count for any A/D converter.}
A.2.5 ATD accuracy (3.3V Range)
Table A-13 specifies the ATD conversion performance excluding any errors due to current injection, input
capacitance and source resistance.
Table A-13. 3.3V ATD Conversion Performance
Conditions are shown in Table A-4 unless otherwise noted
V_REF = V_RH - V_RL = 3.328V. Resulting to one 8 bit count = 13mV and one 10 bit count = 3.25mV
f_ATDCLK = 2.0MHz
Num C
Rating
Symbol
Min
Typ
Max
Unit
1
P 10-Bit Resolution
LSB
−
3.25
2
P 10-Bit Differential Nonlinearity
DNL
–1.5
−
3
P 10-Bit Integral Nonlinearity
4
P 10-Bit Absolute Error¹
INL
–3.5
±1.5
AE
−5
±2.5
5
P 8-Bit Resolution
LSB
−
13
6
P 8-Bit Differential Nonlinearity
DNL
–0.5
−
7
P 8-Bit Integral Nonlinearity
INL
–1.5
±1.0
8
P 8-Bit Absolute Error¹
AE
−2.0
±1.5
1 _{These values include the quantization error which is inherently 1/2 count for any A/D converter.}
−
mV
+1.5 Counts
+3.5 Counts
+5
Counts
−
mV
0.5
Counts
1.5
Counts
2.0
Counts
For the following definitions see also Figure A-1.
Differential Non-Linearity (DNL) is defined as the difference between two adjacent switching steps.
DNL(i) = -^V----ⁱ-₁--^–--_L--^V-_S---_B-ⁱ--^–----¹- – 1
The Integral Non-Linearity (INL) is defined as the sum of all DNLs:
∑ INL(n) = n DNL(i) = -V---1-n--L--–--S---VB----0- – n
i=1
MC3S12RG128 Data Sheet, Rev. 1.05
520
Freescale Semiconductor