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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STM32F411RET6 датащи(PDF) 120 Page - STMicroelectronics |
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STM32F411RET6 датащи(HTML) 120 Page - STMicroelectronics |
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120 / 149 page  Electrical characteristics STM32F411xC STM32F411xE 120/149 DocID026289 Rev 6 6.3.22 VBAT monitoring characteristics 6.3.23 Embedded reference voltage The parameters given in Table 74 are derived from tests performed under ambient temperature and VDD supply voltage conditions summarized in Table 14. Table 73. VBAT monitoring characteristics Symbol Parameter Min Typ Max Unit R Resistor bridge for VBAT -50- K Ω Q Ratio on VBAT measurement - 4 - Er(1) Error on Q –1 - +1 % TS_vbat(2)(2) ADC sampling time when reading the VBAT 1 mV accuracy 5- - µs 1. Guaranteed by design. 2. Shortest sampling time can be determined in the application by multiple iterations. Table 74. Embedded internal reference voltage Symbol Parameter Conditions Min Typ Max Unit VREFINT Internal reference voltage - 40 °C < TA < + 125 °C 1.18 1.21 1.24 V TS_vrefint(1) ADC sampling time when reading the internal reference voltage -10 - - µs VRERINT_s(2) Internal reference voltage spread over the temperature range VDD = 3V ± 10mV - 3 5 mV TCoeff(2) Temperature coefficient - - 30 50 ppm/°C tSTART(2) Startup time - - 6 10 µs 1. Shortest sampling time can be determined in the application by multiple iterations. 2. Guaranteed by design. Table 75. Internal reference voltage calibration values Symbol Parameter Memory address VREFIN_CAL Raw data acquired at temperature of 30 °C VDDA = 3.3 V 0x1FFF 7A2A - 0x1FFF 7A2B |
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