EZR32HG320 Datasheet, PDF (43/87 Pages) Silicon Laboratories – Consumer electronics

EZR32HG320 Data Sheet
Electrical Specifications
Symbol
Parameter
Condition
Min
Typ
Max
Unit
Internal 1.25V, V_DD = 3V, 25°C
1.248
1.254
1.262
V
VREF_ADC
ADC Internal Voltage
Reference
Internal 1.25V, Full temperature
and supply range
Internal 2.5V, V_DD = 3V, 25°C
1.188
2.492
1.254
2.506
1.302
V
2.520
V
Internal 2.5V, Full temperature
and supply range
2.402
2.506
2.600
V
Note:
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.
The integral non-linearity (INL) and differential non-linearity parameters are explained in Figure 3.14 (p. 33) and Figure 3.15 (p. 33) ,
respectively.
Digital ouput code
4095
4094
4093
4092
INL=|[(VD-VSS)/VLSBIDEAL] - D| where 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
Figure 4.26. Integral Non-Linearity (INL)
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