Preliminary
Figure 3.24. Integral Non-Linearity (INL)
Digital ouput code
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INL= |[(VD- VSS)/ VLSBIDEAL] - D| where 0 < D < 2N - 1
4095
4094
4093
4092
Actual ADC
tranfer function
before offset and
gain correction
Actual ADC
tranfer function
after offset and
gain correction
INL Error
(End Point INL)
Ideal transfer
curve
3
2
1
0
VOFFSET
Analog Input
Figure 3.25. Differential Non-Linearity (DNL)
Digital
ouput
DNL= |[(VD+ 1 - VD)/ VLSBIDEAL] - 1| where 0 < D < 2N - 2
code
4095
4094
4093
4092
Full Scale Range
Example: Adjacent
input value VD+ 1
corrresponds to digital
output code D+ 1
Actual transfer
function with one
missing code.
Example: Input value
VD corrresponds to
digital output code D
Code width = 2 LSB
DNL= 1 LSB
Ideal transfer
curve
0.5
LSB
Ideal spacing
between two
adjacent codes
VLSBIDEAL= 1 LSB
5
4
3
2
1
0
Ideal 50%
Transition Point
Ideal Code Center
Analog Input
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2013-10-09 - EFM32ZG110FXX - d0064_Rev0.60
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