Datasheet

Electrical characteristics STM32H743xI
166/226 DocID030538 Rev 3
6.3.22 Voltage reference buffer characteristics
Table 88. VREFBUF characteristics
(1)
Symbol Parameter Conditions Min Typ Max Unit
V
DDA
Analog supply voltage
Normal mode
VSCALE = 000 2.8 3.3 3.6
V
VSCALE = 001 2.4 - 3.6
VSCALE = 010 2.1 - 3.6
VSCALE = 011 1.8 - 3.6
Degraded mode
VSCALE = 000 1.62 - 2.80
VSCALE = 001 1.62 - 2.40
VSCALE = 010 1.62 - 2.10
VSCALE = 011 1.62 - 1.80
V
REFBUF
_OUT
Voltage Reference
Buffer Output
Normal mode
VSCALE = 000 - 2.5 -
VSCALE = 001 - 2.048 -
VSCALE = 010 - 1.8 -
VSCALE = 011 - 1.5 -
Degraded mode
(2)
VSCALE = 000
V
DDA

150 mV
-V
DDA
VSCALE = 001
V
DDA

150 mV
-V
DDA
VSCALE = 010
V
DDA

150 mV
-V
DDA
VSCALE = 011
V
DDA

150 mV
-V
DDA
TRIM Trim step resolution - - - ±0.05 ±0.2 %
C
L
Load capacitor - - 0.5 1 1.50 uF
esr
Equivalent Serial
Resistor of C
L
----2Ω
I
load
Static load current - - - - 4 mA
I
line_reg
Line regulation 2.8 V  V
DDA
 3.6 V
I
load
= 500 µA - 200 -
ppm/V
I
load
= 4 mA - 100 -
I
load_reg
Load regulation 500 µA  I
LOAD
 4 mA Normal Mode - 50 -
ppm/
mA
T
coeff
Temperature coefficient
40 °C < T
J
< +105 °C - - -
T
coeff
xV
REFINT
+ 50
ppm/
°C
0 °C < T
J
< +50 °C - - -
T
coeff
xV
REFINT
+ 50
PSRR Power supply rejection
DC - - 60 -
dB
100KHz - - 40 -
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