MC9S12A32 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'MC9S12A32' PDF : 128 Pages View PDF
MC9S12DJ64 Device User Guide — V01.20
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
VREF = VRH - VRL = 5.12V. Resulting to one 8 bit count = 20mV and one 10 bit count = 5mV
fATDCLK = 2.0MHz
Num C
Rating
Symbol Min
Typ
1 P 10-Bit Resolution
LSB
5
2 P 10-Bit Differential Nonlinearity
DNL
–1
3 P 10-Bit Integral Nonlinearity
INL
–2.5
±1.5
4 P 10-Bit Absolute Error1
AE
-3
±2.0
5 P 8-Bit Resolution
LSB
20
6 P 8-Bit Differential Nonlinearity
DNL
–0.5
7 P 8-Bit Integral Nonlinearity
INL
–1.0
±0.5
8 P 8-Bit Absolute Error1
AE
-1.5
±1.0
NOTES:
1. These values include the quantization error which is inherently 1/2 count for any A/D converter.
Max
1
2.5
3
0.5
1.0
1.5
Unit
mV
Counts
Counts
Counts
mV
Counts
Counts
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-----i1--–--L---VS----i-B--–---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----V-B---0- – n
i=1
99
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