Table 56. Adc Accuracy - STMicroelectronics STM32L151RE Manual

Electrical characteristics
Symbol Parameter
ET Total unadjusted error
EO Offset error
EG Gain error
ED Differential linearity error
EL Integral linearity error
ENOB Effective number of bits
Signal-to-noise and
SINAD
distortion ratio
SNR Signal-to-noise ratio
THD Total harmonic distortion
ENOB Effective number of bits
Signal-to-noise and
SINAD
distortion ratio
SNR Signal-to-noise ratio
THD Total harmonic distortion
ET Total unadjusted error
EO Offset error
EG Gain error
ED Differential linearity error
EL Integral linearity error
ET Total unadjusted error
EO Offset error
EG Gain error
ED Differential linearity error
EL Integral linearity error
1. ADC DC accuracy values are measured after internal calibration.
2. ADC accuracy vs. negative injection current: Injecting a negative current on any 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 analog pins which may potentially inject negative currents.
Any positive injection current within the limits specified for I
accuracy.
3. Guaranteed by characterization results.
104/134

Table 56. ADC accuracy

Test conditions
2.4 V ≤ V ≤ 3.6 V
DDA
2.4 V ≤ V ≤ 3.6 V
REF+
f = 8 MHz, R = 50 Ω
ADC AIN
= -40 to 105 ° C
T
A
2.4 V ≤ V ≤ 3.6 V
DDA
V V
=
DDA REF+
= 50 Ω
f = 16 MHz, R
ADC AIN
= -40 to 105 ° C
T
A
F =10kHz
input
1.8 V ≤ V ≤ 2.4 V
DDA
V V
=
DDA REF+
f = 8 MHz or 4 MHz, R
ADC
= -40 to 105 ° C
T
A
F =10kHz
input
2.4 V ≤ V ≤ 3.6 V
DDA
1.8 V ≤ V ≤ 2.4 V
REF+
= 50 Ω
f = 4 MHz, R
ADC AIN
= -40 to 105 ° C
T
A
1.8 V ≤ V ≤ 2.4 V
DDA
1.8 V ≤ V ≤ 2.4 V
REF+
= 50 Ω
f = 4 MHz, R
ADC AIN
= -40 to 105 ° C
T
A
INJ(PIN)
DocID025433 Rev 8
STM32L151xE STM32L152xE
(1)(2)
(3)
Min
-
-
-
-
-
9.2
57.5
57.5
-
9.2
57.5
= 50 Ω
AIN
57.5
-
-
-
-
-
-
-
-
-
-
-
and ΣI
in Section 6.3.12
INJ(PIN)
(3)
Typ Max Unit
2.5 4
1 2
1.5 3.5 LSB
1 2
2.2 3
10 - bits
62 -
dB
62 -
-70 -65
10 - bits
62 -
dB
62 -
-70 -65
4 6.5
1.5 4
3.5 6 LSB
1 2
2.5 3
2 3
1 1.5
1.5 2 LSB
1 2
2.2 3
does not affect the ADC