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STM32F479AI bảng dữ liệu(PDF) 161 Page - STMicroelectronics

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STM32F479AI bảng dữ liệu(HTML) 161 Page - STMicroelectronics

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STM32F479xx
Electrical characteristics
190
5.3.25
Temperature sensor characteristics
5.3.26
VBAT monitoring characteristics
5.3.27
Reference voltage
The parameters given in Table 85 are derived from tests performed under ambient
temperature and VDD supply voltage conditions summarized in Table 17.
Table 82. Temperature sensor characteristics
Symbol
Parameter
Min
Typ
Max
Unit
TL(1)
VSENSE linearity with temperature
-
±1
±2°C
Avg_Slope(1) Average slope
-
2.5
-
mV/°C
V25(1)
Voltage at 25 °C
-
0.76
-
V
tSTART(2)
Startup time
-
6
10
µs
TS_temp(2)
ADC sampling time when reading the temperature (1 °C accuracy)
10
-
-
1. Based on test during characterization.
2. Guaranteed by design.
Table 83. Temperature sensor calibration values
Symbol
Parameter
Memory address
TS_CAL1
TS ADC raw data acquired at temperature of 30 °C, VDDA= 3.3 V
0x1FFF 7A2C - 0x1FFF 7A2D
TS_CAL2
TS ADC raw data acquired at temperature of 110 °C, VDDA= 3.3 V 0x1FFF 7A2E - 0x1FFF 7A2F
Table 84. VBAT monitoring characteristics
Symbol
Parameter
Min
Typ
Max
Unit
R
Resistor bridge for VBAT
-50-
K
Ω
Q
Ratio on VBAT measurement
-
4
-
Er(1)
Error on Q
–1
-
+1
%
TS_vbat(2)(2)
ADC sampling time when reading the VBAT
1 mV accuracy
5-
-
µs
1. Guaranteed by design.
2. Shortest sampling time can be determined in the application by multiple iterations.
Table 85. internal reference voltage
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VREFINT
Internal reference voltage
–40 °C < TA < +105 °C
1.18
1.21
1.24
V
TS_vrefint(1)
ADC sampling time when reading the
internal reference voltage
10
-
-
µs
VRERINT_s(2)
Internal reference voltage spread over the
temperature range
VDD = 3V ± 10mV
-
3
5
mV



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