Datasheet

Appendix A Electrical Characteristics
Freescale Semiconductor MC9S12C-Family / MC9S12GC-Family 661
Rev 01.24
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.
For the following definitions see also Figure A-1.
Differential Non-Linearity (DNL) is defined as the difference between two adjacent switching steps.
The Integral Non-Linearity (INL) is defined as the sum of all DNLs:
Table A-13. 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 mV
2 P 10-Bit Differential Nonlinearity DNL –1.5 1.5 Counts
3 P 10-Bit Integral Nonlinearity INL –3.5 ±1.5 3.5 Counts
4 P 10-Bit Absolute Error
(1)
1. These values include the quantization error which is inherently 1/2 count for any A/D converter.
AE –5 ±2.5 5 Counts
5 P 8-Bit Resolution LSB 13 mV
6 P 8-Bit Differential Nonlinearity DNL –0.5 0.5 Counts
7 P 8-Bit Integral Nonlinearity INL –1.5 ±1 1.5 Counts
8 P 8-Bit Absolute Error
1
AE –2.0 ±1.5 2.0 Counts
DNL i()
V
i
V
i1
1LSB
---------------------------
1=
INL n() DNL i()
i1=
n
V
n
V
0
1LSB
---------------------
n==