Datasheet

STM32F051x Electrical characteristics
Doc ID 022265 Rev 3 45/105
6.3.4 Embedded reference voltage
The parameters given in Ta ble 2 4 are derived from tests performed under ambient
temperature and V
DD
supply voltage conditions summarized in Table 2 0 .
6.3.5 Supply current characteristics
The current consumption is a function of several parameters and factors such as the
operating voltage, ambient temperature, I/O pin loading, device software configuration,
operating frequencies, I/O pin switching rate, program location in memory and executed
binary code.
The current consumption is measured as described in Figure 11: Current consumption
measurement scheme.
All Run-mode current consumption measurements given in this section are performed with a
reduced code that gives a consumption equivalent to CoreMark code.
V
PVD5
PVD threshold 5
Rising edge 2.57 2.68 2.79 V
Falling edge 2.47 2.58 2.69 V
V
PVD6
PVD threshold 6
Rising edge 2.66 2.78 2.9 V
Falling edge 2.56 2.68 2.8 V
V
PVD7
PVD threshold 7
Rising edge 2.76 2.88 3 V
Falling edge 2.66 2.78 2.9 V
V
PVDhyst
(2)
PVD hysteresis - 100 - mV
I
DD(PVD)
PVD current consumption - 0.15 0.26 µA
1. Data based on characterization results only, not tested in production.
2. Guaranteed by design, not tested in production.
Table 23. Programmable voltage detector characteristics (continued)
Symbol Parameter Conditions Min
(1)
Typ Max
(1)
Unit
Table 24. Embedded internal reference voltage
Symbol Parameter Conditions Min Typ Max Unit
V
REFINT
Internal reference voltage
–40 °C < T
A
< +105 °C 1.16 1.2 1.25 V
–40 °C < T
A
< +85 °C 1.16 1.2 1.24
(1)
1. Data based on characterization results, not tested in production.
V
T
S_vrefint
(2)
2. Shortest sampling time can be determined in the application by multiple iterations.
ADC sampling time when
reading the internal
reference voltage
-5.1 17.1
(3)
3. Guaranteed by design, not tested in production.
µs
V
RERINT
Internal reference voltage
spread over the
temperature range
V
DD
= 3 V ±10 mV - -
10
(3)
mV
T
Coeff
Temperature coefficient - -
100
(3)
ppm/°C