EFM32LG330 Datasheet, PDF (30/66 Pages) Silicon Laboratories – High Performance 32-bit processor up to 48 MHz memory Protection Unit

Preliminary
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Symbol
Parameter
Condition
Min
Typ
Max
Unit
OFFSET_ED Offset error drift
1.25V reference
2.5V reference
0.2²
0.7³ LSB/°C
0.2²
0.62³ LSB/°C
1_{On 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.
2_{Typical numbers given by abs(Mean) / (85 - 25).}
3_{Max 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.
30) and Figure 3.13 (p. 31) , respectively.
Figure 3.12. Integral Non-Linearity (INL)
Digital ouput code
4095
4094
4093
4092
INL= |[ (V_D-V_SS)/V_LSBIDEAL] - D| w here 0 < D < 2^N - 1
Actual ADC
tranfer function
before offset and
gain correction
Actual ADC
tranfer function
after offset and
gain correction
INL Error
(End Point INL)
3
Ideal transfer
curve
2
1
VOFFSET
0
Analog Input
2013-06-28 - EFM32LG330FXX - d0110_Rev1.10
30
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