Datasheet

DS10198 Rev 8 195/270
STM32L476xx Electrical characteristics
238
6.3.20 Voltage reference buffer characteristics
Table 84. VREFBUF characteristics
(1)
Symbol Parameter Conditions Min Typ Max Unit
V
DDA
Analog supply
voltage
Normal mode
V
RS
= 0 2.4 - 3.6
V
V
RS
= 1 2.8 - 3.6
Degraded mode
(2)
V
RS
= 0 1.65 - 2.4
V
RS
= 1 1.65 - 2.8
V
REFBUF_
OUT
Voltage
reference
output
Normal mode
V
RS
= 0 2.046
(3)
2.048 2.049
(3)
V
RS
= 1 2.498
(3)
2.5 2.502
(3)
Degraded mode
(2)
V
RS
= 0 V
DDA
-150 mV - V
DDA
V
RS
= 1 V
DDA
-150 mV - V
DDA
TRIM
Trim step
resolution
---±0.05±0.1%
CL Load capacitor - - 0.5 1 1.5 µF
esr
Equivalent
Serial Resistor
of Cload
----2
I
load
Static load
current
----4mA
I
line_reg
Line regulation 2.8 V  V
DDA
 3.6 V
I
load
= 500 µA - 200 1000
ppm/V
I
load
= 4 mA - 100 500
I
load_reg
Load
regulation
500 A  I
load
4 mA Normal mode - 50 500 ppm/mA
T
Coeff
Temperature
coefficient
-40 °C < TJ < +125 °C - -
T
coeff_
vrefint +
50
ppm/ °C
0 °C < TJ < +50 °C - -
T
coeff_
vrefint
+
50
PSRR
Power supply
rejection
DC 40 60 -
dB
100 kHz 25 40 -
t
START
Start-up time
CL = 0.5 µF
(4)
- 300 350
µsCL = 1.1 µF
(4)
- 500 650
CL = 1.5 µF
(4)
- 650 800
I
INRUSH
Control of
maximum DC
current drive
on VREFBUF_
OUT during
start-up phase
(5)
---8-mA
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