Datasheet

DocID030538 Rev 3 167/226
STM32H743xI Electrical characteristics
196
6.3.23 Temperature sensor characteristics
t
START
Start-up time
C
L
=0.5 µF - - 300 -
µsC
L
=1 µF - - 500 -
C
L
=1.5 µF - - 650 -
I
INRUSH
Control of maximum
DC current drive on
V
REFBUF_OUT
during
startup phase
(3)
--8-mA
I
DDA(VRE
FBUF)
VREFBUF
consumption from
V
DDA
I
LOAD
= 0 µA - - 15 25
µAI
LOAD
= 500 µA - - 16 30
I
LOAD
= 4 mA - - 32 50
1. Guaranteed by design.
2. In degraded mode, the voltage reference buffer cannot accurately maintain the output voltage (V
DDA
drop voltage).
3. To properly control VREFBUF I
INRUSH
current during the startup phase and the change of scaling, V
DDA
voltage should be in
the range of 1.8 V-3.6 V, 2.1 V-3.6 V, 2.4 V-3.6 V and 2.8 V-3.6 V for VSCALE = 011, 010, 001 and 000, respectively.
Table 88. VREFBUF characteristics
(1)
(continued)
Symbol Parameter Conditions Min Typ Max Unit
Table 89. Temperature sensor characteristics
Symbol Parameter Min Typ Max Unit
T
L
(1)
1. Guaranteed by design.
V
SENSE
linearity with temperature - - 3 °C
Avg_Slope
(2)
2. Guaranteed by characterization.
Average slope - 2 - mV/°C
V
30
(3)
3. Measured at V
DDA
= 3.3 V ± 10 mV. The V
30
ADC conversion result is stored in the TS_CAL1
byte.
Voltage at 30°C ± 5 °C - 0.62 - V
t
start_run
(1)
Startup time in Run mode (buffer startup) - - 25.2
µs
t
S_temp
(1)
ADC sampling time when reading the temperature 9 - -
I
sens
(1)
Sensor consumption - 0.18 0.31
µA
I
sensbuf
(1)
Sensor buffer consumption - 3.8 6.5
Table 90. Temperature sensor calibration values
Symbol Parameter Memory address
TS_CAL1
Temperature sensor raw data acquired value at
30 °C, V
DDA
=3.3 V
0x1FF1 E820 -0x1FF1 E821
TS_CAL2
Temperature sensor raw data acquired value at
110 °C, V
DDA
=3.3 V
0x1FF1 E840 - 0x1FF1 E841
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