Datasheet

DocID030538 Rev 3 101/226
STM32H743xI Electrical characteristics
196
6.3.5 Embedded reference voltage
The parameters given in Table 27 are derived from tests performed under ambient
temperature and V
DD
supply voltage conditions summarized in Table 23: General operating
conditions.
V
AVM_0
Analog voltage detector for
V
DDA
threshold 0
Rising edge 1.66 1.71 1.76
V
Falling edge 1.56 1.61 1.66
V
AVM_1
Analog voltage detector for
V
DDA
threshold 1
Rising edge 2.06 2.12 2.19
Falling edge 1.96 2.02 2.08
V
AVM_2
Analog voltage detector for
V
DDA
threshold 2
Rising edge 2.42 2.50 2.58
Falling edge 2.35 2.42 2.49
V
AVM_3
Analog voltage detector for
V
DDA
threshold 3
Rising edge 2.74 2.83 2.91
Falling edge 2.64 2.72 2.80
V
hyst_VDDA
Hysteresis of V
DDA
voltage
detector
- - 100 - mV
I
DD_PVM
PVM consumption from
V
DD(1)
---0.25µA
I
DD_VDDA
Voltage detector
consumption on V
DDA
(1)
Resistor bridge - - 2.5 µA
1. Guaranteed by design.
2. BOR0 is enabled in all modes (except Shutdown) and its consumption is therefore included in the supply current
characteristics tables (refer to Section 6.3.6: Supply current characteristics).
Table 26. Reset and power control block characteristics (continued)
Symbol Parameter Conditions Min Typ Max Unit
Table 27. Embedded reference voltage
Symbol Parameter Conditions Min Typ Max Unit
V
REFINT
Internal reference voltages -40°C < TJ < 105°C 1.180 1.216 1.255 V
t
S_vrefint
(1)(2)
ADC sampling time when
reading the internal reference
voltage
-4.3--
µs
t
S_vbat
(1)
VBAT sampling time when
reading the internal VBAT
reference voltage
-9--
I
refbuf
(2)
Reference Buffer
consumption for ADC
V
DDA
=3.3 V 9 13.5 23 µA
ΔV
REFINT
(2)
Internal reference voltage
spread over the temperature
range
-40°C < T
J
< 105°C - 5 15 mV
T
coeff
Average temperature
coefficient
Average temperature
coefficient
-2070ppm/°C
V
DDcoeff
Average Voltage coefficient 3.0V < V
DD
< 3.6V - 10 1370 ppm/V
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