
Preliminary
...the world's most energy friendly microcontrollers
2013-06-28 - EFM32GG295FXX - d0077_Rev1.10
30
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Symbol
Parameter
Condition
Min
Typ
Max
Unit
1.25V reference
0.2
2
0.7
3
LSB/°C
OFFSETED
Offset error drift
2.5V reference
0.2
2
0.62
3
LSB/°C
1On the average every ADC will have one missing code, most likely to appear around 2048 +/- n*512 where n can be a value in
the set {-3, -2, -1, 1, 2, 3}. There will be no missing code around 2048, and in spite of the missing code the ADC will be monotonic
at all times so that a response to a slowly increasing input will always be a slowly increasing output. Around the one code that is
missing, the neighbour codes will look wider in the DNL plot. The spectra will show spurs on the level of -78dBc for a full scale
input for chips that have the missing code issue.
2Typical numbers given by abs(Mean) / (85 - 25).
3Max number given by (abs(Mean) + 3x stddev) / (85 - 25).
The integral non-linearity (INL) and differential non-linearity parameters are explained in
Figure 3.12 (p.Figure 3.12. Integral Non-Linearity (INL)
Ideal t ransfer
curve
Digit al ouput code
Analog Input
INL= |[ (VD-VSS)/VLSBIDEAL] - D| where 0 < D < 2
N - 1
0
1
2
3
4092
4093
4094
4095
VOFFSET
Act ual ADC
t ranfer funct ion
before offset and
gain correct ion
Act ual ADC
t ranfer funct ion
aft er offset and
gain correct ion
INL Error
(End Point INL)