STMicroelectronics STM32L162RC, Manual

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STM32L162VC, STM32L162RC
104
Table 57. ADC accuracy
(1)(2)
Symbol Parameter Test conditions Min
(3)
Typ Max
(3)
Unit
ET Total unadjusted error
2.4 V ≤ V
DDA
≤ 3.6 V
2.4 V
≤
V
REF+
≤
3.6 V
f
ADC
= 8 MHz, R
AIN
= 50 Ω
T
A
= -40 to 105
°
C
- 2 4
LSB
EO Offset error - 1 2
EG Gain error - 1.5 3.5
ED Differential linearity error - 1 2
EL Integral linearity error - 1.7 3
ENOB Effective number of bits
2.4 V
≤
V
DDA
≤
3.6 V
V
DDA
=
V
REF+
f
ADC
= 16 MHz, R
AIN
= 50
Ω
T
A
= -40 to 105 ° C
F
input
=10kHz
9.2 10 - bits
SINAD
Signal-to-noise and
distortion ratio
57.5 62 -
dB
SNR Signal-to-noise ratio 57.5 62 -
THD Total harmonic distortion - -70 -65
ENOB Effective number of bits
1.8 V ≤ V
DDA
≤ 2.4 V
V
DDA
=
V
REF+
f
ADC
= 8 MHz or 4 MHz, R
AIN
= 50 Ω
T
A
= -40 to 105
°
C
F
input
=10kHz
9.2 10 - bits
SINAD
Signal-to-noise and
distortion ratio
57.5 62 -
dB
SNR Signal-to-noise ratio 57.5 62 -
THD Total harmonic distortion - -70 -65
ET Total unadjusted error
2.4 V
≤
V
DDA
≤
3.6 V
1.8 V ≤ V
REF+
≤ 2.4 V
f
ADC
= 4 MHz, R
AIN
= 50
Ω
T
A
= -40 to 105 ° C
- 4 6.5
LSB
EO Offset error - 2 4
EG Gain error - 4 6
ED Differential linearity error - 1 2
EL Integral linearity error - 1.5 3
ET Total unadjusted error
1.8 V ≤ V
DDA
≤ 2.4 V
1.8 V
≤
V
REF+
≤
2.4 V
f
ADC
= 4 MHz, R
AIN
= 50 Ω
T
A
= -40 to 105
°
C
- 2 3
LSB
EO Offset error - 1 1.5
EG Gain error - 1.5 2
ED Differential linearity error - 1 2
EL Integral linearity error - 1 1.5
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
INJ(PIN)
and Σ I
INJ(PIN)
in Section 6.3.12 does not affect the ADC
accuracy.
3. Guaranteed by characterization results.