MC9S12HZ256 Datasheet, PDF (634/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Appendix A Electrical Characteristics
A.2.3 ATD accuracy
Table A-10 specifies the ATD conversion performance excluding any errors due to current injection, input
capacitance and source resistance.
Table A-10. ATD Conversion Performance
Conditions are shown in Table A-4 unless otherwise noted
V_REF = V_RH – V_RL = 5.12V. Resulting to one 8 bit count = 20mV and one 10 bit count = 5mV
f_ATDCLK = 2.0MHz
Num C
Rating
Symbol
Min
Typ
Max
Unit
1 P 10-Bit Resolution
LSB
5
2 P 10-Bit Differential Nonlinearity
DNL
–1
3 P 10-Bit Integral Nonlinearity
4 P 10-Bit Absolute Error (Port AD)¹
5 P 10-Bit Absolute Error (Port L)¹
INL
–2.5
±1.5
AE
–3
±2.0
AE
–4
±3.0
6 P 8-Bit Resolution
LSB
20
7 P 8-Bit Differential Nonlinearity
DNL
–0.5
8 P 8-Bit Integral Nonlinearity
INL
–1.0
±0.5
9 P 8-Bit Absolute Error (Port AD)¹
AE
–1.5
±1.0
10 P 8-Bit Absolute Error (Port L)¹
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
Counts
2.5
Counts
3
Counts
4
Counts
mV
0.5
Counts
1.0
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----_Bⁱ---^–----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
MC9S12HZ256 Data Sheet, Rev. 2.04
634
Freescale Semiconductor