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Electrical characteristics STM32F405xx, STM32F407xx
134/185 DocID022152 Rev 4
5.3.21 Temperature sensor characteristics
5.3.22 V
BAT
monitoring characteristics
Table 69. Temperature sensor characteristics
Symbol Parameter Min Typ Max Unit
T
L
(1)
V
SENSE
linearity with temperature - ±1 ±2°C
Avg_Slope
(1)
Average slope - 2.5 mV/°C
V
25
(1)
Voltage at 25 °C - 0.76 V
t
START
(2)
Startup time - 6 10 µs
T
S_temp
(3)(2)
ADC sampling time when reading the temperature (1 °C accuracy) 10 - - µs
1. Based on characterization, not tested in production.
2. Guaranteed by design, not tested in production.
3. Shortest sampling time can be determined in the application by multiple iterations.
Table 70. Temperature sensor calibration values
Symbol Parameter Memory address
TS_CAL1 TS ADC raw data acquired at temperature of 30 °C, V
DDA
=3.3 V 0x1FFF 7A2C - 0x1FFF 7A2D
TS_CAL2 TS ADC raw data acquired at temperature of 110 °C, V
DDA
=3.3 V 0x1FFF 7A2E - 0x1FFF 7A2F
Table 71. V
BAT
monitoring characteristics
Symbol Parameter Min Typ Max Unit
R Resistor bridge for V
BAT
-50-KΩ
Q Ratio on V
BAT
measurement - 2 -
Er
(1)
Error on Q –1 - +1 %
T
S_vbat
(2)(2)
ADC sampling time when reading the V
BAT
1 mV accuracy
5--µs
1. Guaranteed by design, not tested in production.
2. Shortest sampling time can be determined in the application by multiple iterations.