Datasheet

Electrical characteristics STM32F401xD STM32F401xE
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6.3.21 Temperature sensor characteristics
6.3.22 V
BAT
monitoring characteristics
6.3.23 Embedded reference voltage
The parameters given in Table 75 are derived from tests performed under ambient
temperature and V
DD
supply voltage conditions summarized in Table 14.
Table 72. 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
(2)
ADC sampling time when reading the temperature (1 °C accuracy) 10 - - µs
1. Guaranteed by characterization, not tested in production.
2. Guaranteed by design, not tested in production.
Table 73. 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 74. V
BAT
monitoring characteristics
Symbol Parameter Min Typ Max Unit
R Resistor bridge for V
BAT
-50-KΩ
Q
Ratio on V
BAT
measurement - 4 -
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.
Table 75. Embedded internal reference voltage
Symbol Parameter Conditions Min
Typ
Max Unit
V
REFINT
Internal reference voltage –40 °C < T
A
< +105 °C 1.18 1.21 1.24 V
T
S_vrefint
(1)
ADC sampling time when reading the
internal reference voltage
-10--µs
V
RERINT_s
(2)
Internal reference voltage spread over the
temperature range
V
DD
= 3V ± 10mV - 3 5 mV
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