Datasheet

Table Of Contents
Analog to Digital Converter
Sample Conversion
MC9S12DP256 — Revision 1.1
Analog to Digital Converter
Figure 113 ATD Accuracy Definitions
NOTES
Example
:
1) Input in milliVolts, VREFH-VREFL
= 5.120 Volts
2) one 10-Bit count = 5 mV.
3) A = inherent 10-Bit quantization error OF 2.5mV
4) B = circuit-contributed
+7.5mV
ERROR
5) C = +10mV absolute error equals 2 10-Bit counts
20
40
60
0
1
2
3
4
5
6
7
8
9
A
B
C
+10 mV (2 counts) 10 bit absolute error boundary
-10 mV (2 counts) 10 bit absolute error boundary
A
B
C
Ideal transfer curve
10 bit transfer curve
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
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