Datasheet

DocID026289 Rev 6 115/149
STM32F411xC STM32F411xE Electrical characteristics
123
Equation 1: R
AIN
max formula
The formula above (Equation 1) is used to determine the maximum external impedance
allowed for an error below 1/4 of LSB. N = 12 (from 12-bit resolution) and k is the number of
sampling periods defined in the ADC_SMPR1 register.
Table 66. ADC accuracy at f
ADC
= 18 MHz
(1)
1. Better performance could be achieved in restricted V
DD
, frequency and temperature ranges.
Symbol Parameter Test conditions Typ Max
(2)
2. Guaranteed by characterization results.
Unit
ET Total unadjusted error
f
ADC
=18 MHz
V
DDA
= 1.7 to 3.6 V
V
REF
= 1.7 to 3.6 V
V
DDA
− V
REF
< 1.2 V
±3 ±4
LSB
EO Offset error ±2 ±3
EG Gain error ±1 ±3
ED Differential linearity error ±1 ±2
EL Integral linearity error ±2 ±3
Table 67. ADC accuracy at f
ADC
= 30 MHz
(1)
1. Better performance could be achieved in restricted V
DD
, frequency and temperature ranges.
Symbol Parameter Test conditions Typ Max
(2)
2. Guaranteed by characterization results.
Unit
ET Total unadjusted error
f
ADC
= 30 MHz,
R
AIN
< 10 kΩ,
V
DDA
= 2.4 to 3.6 V,
V
REF
= 1.7 to 3.6 V,
V
DDA
− V
REF
< 1.2 V
±2 ±5
LSB
EO Offset error ±1.5 ±2.5
EG Gain error ±1.5 ±4
ED Differential linearity error ±1 ±2
EL Integral linearity error ±1.5 ±3
Table 68. ADC accuracy at f
ADC
= 36 MHz
(1)
1. Better performance could be achieved in restricted V
DD
, frequency and temperature ranges.
Symbol Parameter Test conditions Typ Max
(2)
2. Guaranteed by characterization results.
Unit
ET Total unadjusted error
f
ADC
=36 MHz,
V
DDA
= 2.4 to 3.6 V,
V
REF
= 1.7 to 3.6 V
V
DDA
− V
REF
< 1.2 V
±4 ±7
LSB
EO Offset error ±2 ±3
EG Gain error ±3 ±6
ED Differential linearity error ±2 ±3
EL Integral linearity error ±3 ±6
R
AIN
k0.5–()
f
ADC
C
ADC
2
N 2+
()ln××
---------------------------------------------------------------- R
ADC
–=
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.