STM32L072X8 Datasheet, PDF (101/147 Pages) STMicroelectronics – Ultra-low-power 32-bit MCU ARM-based Cortex-M0+, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, USB, ADC, DACs

STM32L072xx
Electrical characteristics
Table 66. ADC accuracy^(1)(2)(3) (continued)
Symbol
Parameter
Conditions
Min Typ Max Unit
ET Total unadjusted error
EO Offset error
EG Gain error
EL Integral linearity error
ED Differential linearity error
ENOB Effective number of bits
SINAD Signal-to-noise distortion
SNR Signal-to-noise ratio
THD Total harmonic distortion
-
2
5
-
1
2.5
-
1
2
LSB
- 1.5
3
1.65 V < V_REF+ <V_DDA < 3.6 V,
range 1/2/3
-
1
2
10.0 11.0
-
bits
62 69
-
61 69
-
dB
- -85 -65
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
accuracy.
injection
current
within
the
limits
specified
for
I_INJ(PIN)
and
I_INJ(PIN)
in
Section
6.3.12
does
not
affect
the
ADC
3. Better performance may be achieved in restricted V_DDA, frequency and temperature ranges.
4. This number is obtained by the test board without additional noise, resulting in non-optimized value for oversampling mode.
Figure 30. ADC accuracy characteristics
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