
74
R01DS0139ED0100
Data Sheet
Chapter 10 Definition of terms
(4) Zero-scale error
This is the difference between the actually measured value of the analog input
voltage and the theoretical value (1/2 LSB) when the digital output changes
from 0…000 to 0…001.
Figure 10-3 Zero-scale error
111
000
Ideal linearity
Analog input
AVREFPAVREFM
Digital output (lower 3 bits)
Zero-scale error
AVREFM
+x
001
100
010
011
AVREFM
+2x
AV
REFM
+3x
AVREFM
−x
Note: x: Voltage equivalent to 1 LSB
x = (AVREP − AVREFM) × 1 LSB
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