MC9S12A256 Motorola, MC9S12A256 Datasheet - Page 103
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MC9S12A256
Manufacturer Part Number
MC9S12A256
Description
MC9S12DT256 Device User Guide V03.03
Manufacturer
Motorola
Datasheet
1.MC9S12A256.pdf
(130 pages)
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Conditions are shown in Table A-4 unless otherwise noted
V
f
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.
Num C
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:
ATDCLK
NOTES:
1. These values include the quantization error which is inherently 1/2 count for any A/D converter.
REF
1
2
3
4
5
6
7
8
= V
P 10-Bit Resolution
P 10-Bit Differential Nonlinearity
P 10-Bit Integral Nonlinearity
P 10-Bit Absolute Error
P 8-Bit Resolution
P 8-Bit Differential Nonlinearity
P 8-Bit Integral Nonlinearity
P 8-Bit Absolute Error
= 2.0MHz
RH
- V
RL
= 5.12V. Resulting to one 8 bit count = 20mV and one 10 bit count = 5mV
1
1
Rating
Table A-10 ATD Conversion Performance
INL n
DNL i
=
i
=
n
1
DNL i
=
V
----------------------- - 1
i
1LSB
–
Symbol
LSB
DNL
LSB
DNL
V
INL
INL
AE
AE
=
i 1
–
MC9S12DT256 Device User Guide — V03.03
V
------------------- - n
1LSB
n
–
–
Min
–2.5
–0.5
–1.0
-1.5
V
–1
-3
0
–
Typ
20
1.5
2.0
0.5
1.0
5
Max
2.5
0.5
1.0
1.5
1
3
Counts
Counts
Counts
Counts
Counts
Counts
Unit
mV
mV
101