Datasheet

DS9773 Rev 4 69/93
STM32F030x4/x6/x8/xC Electrical characteristics
75
Table 51. R
AIN
max for f
ADC
= 14 MHz
T
s
(cycles) t
S
(µs) R
AIN
max (kΩ)
(1)
1.5 0.11 0.4
7.5 0.54 5.9
13.5 0.96 11.4
28.52.0425.2
41.52.9637.2
55.5 3.96 50
71.5 5.11 NA
239.5 17.1 NA
1. Guaranteed by design, not tested in production.
Table 52. ADC accuracy
(1)(2)(3)
Symbol Parameter Test conditions Typ Max
(4)
Unit
ET Total unadjusted error
f
PCLK
= 48 MHz,
f
ADC
= 14 MHz, R
AIN
< 10 kΩ
V
DDA
= 2.7 V to 3.6 V
T
A
= −40 to 85 °C
±3.3 ±4
LSB
EO Offset error ±1.9 ±2.8
EG Gain error ±2.8 ±3
ED Differential linearity error ±0.7 ±1.3
EL Integral linearity error ±1.2 ±1.7
1. ADC DC accuracy values are measured after internal calibration.
2. ADC Accuracy vs. Negative Injection Current: Injecting negative current on any of the standard (non-robust) analog input
pins should be avoided as this significantly reduces the accuracy of the conversion being performed on another analog
input. It is recommended to add a Schottky diode (pin to ground) to standard analog pins which may potentially inject
negative current.
Any positive injection current within the limits specified for I
INJ(PIN)
and ΣI
INJ(PIN)
in Section 6.3.14 does not affect the ADC
accuracy.
3. Better performance may be achieved in restricted V
DDA
, frequency and temperature ranges.
4. Data based on characterization results, not tested in production.