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32G474 Datasheet(PDF) 89 Page - STMicroelectronics

Part # 32G474
Description  Arm® Cortex®-M4 32-bit MCUFPU, 170 MHz / 213 DMIPS, 128 KB SRAM, rich analog, math acc, 184 ps 12 chan Hi-res timer
PDF  236 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

32G474 Datasheet(HTML) 89 Page - STMicroelectronics

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DS12288 Rev 4
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STM32G474xB STM32G474xC STM32G474xE
Electrical characteristics
201
5.3.4
Embedded voltage reference
The parameters given in Table 20 are derived from tests performed under the ambient
temperature and supply voltage conditions summarized in Table 17: General operating
conditions.
Table 20. Embedded internal voltage reference
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VREFINT
Internal reference
voltage
–40 °C < TA < +130 °C 1.182 1.212 1.232
V
tS_vrefint (1)
1. The shortest sampling time is determined in the application by multiple iterations.
ADC sampling time
when reading the
internal reference
voltage
-4(2)
2. Guaranteed by design.
--
µs
tstart_vrefint
Start time of reference
voltage buffer when
ADC is enable
--
8
12(2)
µs
IDD(VREFINTBUF)
VREFINT buffer
consumption from VDD
when converted by
ADC
--
12.5
20(2)
µA
∆VREFINT
Internal reference
voltage spread over
the temperature range
VDD = 3 V
-
5
7.5(2)
mV
TCoeff
Average temperature
coefficient
–40°C < TA < +130°C
-
30
50(2)
ppm/°C
ACoeff
Long term stability
1000 hours, T = 25°C
-
300
1000(2)
ppm
VDDCoeff
Average voltage
coefficient
3.0 V < VDD < 3.6 V
-
250
1200(2) ppm/V
VREFINT_DIV1
1/4 reference voltage
-
24
25
26
%
VREFINT
VREFINT_DIV2
1/2 reference voltage
49
50
51
VREFINT_DIV3
3/4 reference voltage
74
75
76



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