Datasheet

Table 45: ADC characteristics
UnitMaxTypMinConditionsParameterSymbol
MHz
4
-
1V
DD
=2.95 to 5.5 VADC clock frequencyf
ADC
6
-
1V
DD
=4.5 to 5.5 V
VV
DD
-
V
SS
Conversion voltage range
(1)
V
AIN
pF
-
3
-
Internal sample and hold
capacitor
C
ADC
μs
-
0.75
-
f
ADC
= 4 MHzMinimum sampling timet
S
(1)
-
0.5
-
f
ADC
= 6 MHz
μs
-
7
-
Wake-up time from standbyt
STAB
μs3.5f
ADC
= 4 MHzMinimum total conversion time
(including sampling time,
10-bit resolution)
t
CONV
μs2.33f
ADC
= 6 MHz
1/f
ADC
14
(1)
During the sample time the input capacitance C
AIN
(3 pF max) can be charged/discharged
by the external source. The internal resistance of the analog source must allow the
capacitance to reach its final voltage level within t
S.
After the end of the sample time t
S
,
changes of the analog input voltage have no effect on the conversion result. Values for the
sample clock t
S
depend on programming.
Table 46: ADC accuracy with R
AIN
< 10 kΩ , V
DD
= 5 V
UnitMax
(1)
TypConditionsParameterSymbol
LSB
3.51.6f
ADC
= 2 MHzTotal unadjusted error
(2)
|E
T
|
42.2f
ADC
= 4 MHz
4.52.4f
ADC
= 6 MHz
2.51.1f
ADC
= 2 MHzOffset error
(2)
|E
O
|
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Electrical characteristicsSTM8S103K3 STM8S103F3 STM8S103F2