mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 587

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

A.6.4
Table A-22
capacitance and source resistance.
Freescale Semiconductor
1
Conditions are shown in
Conditions are shown in
V
f
ATDCLK
Num
Num
REF
These values include quantization error which is inherently 1/2 count for any A/D converter.
1
2
3
4
5
1
2
3
4
5
6
7
8
9
2. Current is injected into pins in the neighborhood of the channel being converted. A portion of this
= V
current is picked up by the channel (coupling ratio K), This additional current impacts the accuracy
of the conversion depending on the source resistance.
The additional input voltage error on the converted channel can be calculated as
V
to the converted channel.
= 2.0MHz
RH
C
P 10-Bit Resolution
P 10-Bit Differential Nonlinearity
P 10-Bit Integral Nonlinearity
P 10-Bit Absolute Error
C 10-Bit Absolute Error at f
P 8-Bit Resolution
P 8-Bit Differential Nonlinearity
P 8-Bit Integral Nonlinearity
P 8-Bit Absolute Error
ERR
C
C
C
C
C
T
- V
specifies the ATD conversion performance excluding any errors due to current injection, input
ATD Accuracy — 5V Range
RL
= K * R
Max input Source Resistance
Total Input Capacitance
Disruptive Analog Input Current
Coupling Ratio positive current injection
Coupling Ratio negative current injection
= 5.12V. Resulting to one 8 bit count = 20mV and one 10 bit count = 5mV
Non Sampling
Sampling
Table A-4
Table A-4
S
* I
INJ
1
Rating
1
, with I
unless otherwise noted
unless otherwise noted
Table A-22. 5V ATD Conversion Performance
ATDCLK
Table A-21. ATD Electrical Characteristics
Rating
INJ
MC9S12E256 Data Sheet, Rev. 1.08
= 4MHz
being the sum of the currents injected into the two pins adjacent
Symbol
DNL
DNL
LSB
LSB
INL
INL
AE
AE
AE
Symbol
C
C
I
R
K
K
NA
INN
INS
S
p
n
–2.0
–2.5
–0.5
–1.0
–1.5
Min
–1
—
—
—
–2.5
Min
—
—
—
—
—
Appendix A Electrical Characteristics
Typ
20
—
—
—
—
7.0
0.5
1.0
5
Typ
—
—
—
—
—
—
Max
2.0
2.5
0.5
1.0
1.5
—
—
—
1
Max
10
10
2.5
10
15
1
-4
-2
Counts
Counts
Counts
Counts
Counts
Counts
Counts
Unit
Unit
mV
mV
A/A
A/A
K
mA
pF
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