Electrical Characteristics
MC9S12XHY-Family Reference Manual, Rev. 1.01
Freescale Semiconductor
733
A.2.3
ATD Accuracy
Table A-14
and
Table A-15
specifies the ATD conversion performance excluding any errors due to
current injection, input capacitance and source resistance.
Table A-13. ATD Electrical Characteristics
Conditions are shown in
Table A-4
unless otherwise noted
Num
C
Rating
Symbol
Min
Typ
Max
Unit
1
C Max input source resistance
1
1
Refer to
A.2.2.2
for further information concerning source resistance
R
S
—
—
1
K
Ω
2
D Total input capacitance Non sampling
Total input capacitance Sampling
C
INN
C
INS
—
—
—
—
10
16
pF
3
D Input internal Resistance
R
INA
—
5
15
k
Ω
4
C Disruptive analog input current
I
NA
–2.5
—
2.5
mA
5
C Coupling ratio positive current injection
K
p
—
—
1E-4
A/A
6
C Coupling ratio negative current injection
K
n
—
—
3E-3
A/A
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