STM32F415XX Datasheet, PDF (136/186 Pages) STMicroelectronics – ARM Cortex-M4 32b MCU+FPU, 210DMIPS, up to 1MB Flash/192+4KB RAM

Electrical characteristics
STM32F415xx, STM32F417xx
5.3.23 Embedded reference voltage
The parameters given in Table 72 are derived from tests performed under ambient
temperature and V_DD supply voltage conditions summarized in Table 14.
Symbol
Table 72. Embedded internal reference voltage
Parameter
Conditions
Min Typ Max Unit
V_REFINT
T_{S_vrefint(1)}
Internal reference voltage
ADC sampling time when reading the
internal reference voltage
–40 °C < T_A < +105 °C 1.18 1.21
10 -
V_{RERINT_s(2)}
Internal reference voltage spread over the
temperature range
V_DD = 3 V
T_Coeff(2)
t_START(2)
Temperature coefficient
Startup time
1. Shortest sampling time can be determined in the application by multiple iterations.
2. Guaranteed by design, not tested in production.
-3
- 30
-6
1.24
-
5
50
10
V
µs
mV
ppm/°C
µs
Symbol
V_{REFIN_CAL}
Table 73. Internal reference voltage calibration values
Parameter
Memory address
Raw data acquired at temperature of 30 °C, V_DDA=3.3 V
0x1FFF 7A2A - 0x1FFF 7A2B
5.3.24 DAC electrical characteristics
Symbol
Parameter
Table 74. DAC characteristics
Min Typ
Max
Unit
Comments
V_DDA
V_REF+
V_SSA
R_LOAD(2)
Analog supply voltage
Reference supply voltage
Ground
Resistive load with buffer
ON
1.8⁽¹⁾ -
1.8⁽¹⁾ -
0
-
5
-
R_O(2)
Impedance output with
buffer OFF
-
-
C_LOAD(2) Capacitive load
-
-
DAC_OUT Lower DAC_OUT voltage
min⁽²⁾ with buffer ON
DAC_OUT Higher DAC_OUT voltage
max⁽²⁾ with buffer ON
0.2 -
-
-
3.6
3.6
0
-
15
50
-
V_DDA – 0.2
V
V V_REF+ ≤ V_DDA
V
kΩ
When the buffer is OFF, the
kΩ
Minimum resistive load between
DAC_OUT and V_SS to have a 1%
accuracy is 1.5 MΩ
Maximum capacitive load at
pF DAC_OUT pin (when the buffer is
ON).
It gives the maximum output
V ^{excursion of the DAC.}
It corresponds to 12-bit input code
(0x0E0) to (0xF1C) at V_REF+ =
V
3.6 V and (0x1C7) to (0xE38) at
V_REF+ = 1.8 V
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