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STM32L072X8 bảng dữ liệu(PDF) 101 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  Ultra-low-power 32-bit MCU ARM-based Cortex-M0, up to 192KB Flash, 20KB SRAM, 6KB EEPROM, USB, ADC, DACs
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STM32L072xx
Electrical characteristics
117
Figure 30. ADC accuracy characteristics
ET
Total unadjusted error
1.65 V < VREF+ <VDDA < 3.6 V,
range 1/2/3
-2
5
LSB
EO
Offset error
-
1
2.5
EG
Gain error
-
1
2
EL
Integral linearity error
-
1.5
3
ED
Differential linearity error
-
1
2
ENOB
Effective number of bits
10.0
11.0
-
bits
SINAD Signal-to-noise distortion
62
69
-
dB
SNR
Signal-to-noise ratio
61
69
-
THD
Total harmonic distortion
-
-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 injection current within the limits specified for IINJ(PIN) and IINJ(PIN) in Section 6.3.12 does not affect the ADC
accuracy.
3. Better performance may be achieved in restricted VDDA, frequency and temperature ranges.
4. This number is obtained by the test board without additional noise, resulting in non-optimized value for oversampling mode.
Table 66. ADC accuracy(1)(2)(3) (continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit



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