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STM32L475VC 数据表(PDF) 151 Page - STMicroelectronics |
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STM32L475VC 数据表(HTML) 151 Page - STMicroelectronics |
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151 / 193 page  DocID027692 Rev 2 151/193 STM32L475xx Electrical characteristics 181 6.3.19 Voltage reference buffer characteristics Table 72. VREFBUF characteristics(1) Symbol Parameter Conditions Min Typ Max Unit VDDA Analog supply voltage Normal mode VRS = 0 2.4 - 3.6 V VRS = 1 2.8 - 3.6 Degraded mode(2) VRS = 0 1.65 - 2.4 VRS = 1 1.65 - 2.8 VREFBUF_ OUT Voltage reference output Normal mode VRS = 0 2.046(3) 2.048 2.049(3) VRS = 1 2.498(3) 2.5 2.502(3) Degraded mode(2) VRS = 0 VDDA-150 mV - VDDA VRS = 1 VDDA-150 mV - VDDA TRIM Trim step resolution -- - ±0.05 ±0.1 % CL Load capacitor - - 0.5 1 1.5 µF esr Equivalent Serial Resistor of Cload -- - - 2 Ω Iload Static load current -- - - 4 mA Iline_reg Line regulation 2.8 V ≤ VDDA ≤ 3.6 V Iload = 500 µA - 200 1000 ppm/V Iload = 4 mA - 100 500 Iload_reg Load regulation 500 μA ≤ Iload ≤4 mA Normal mode - 50 500 ppm/mA TCoeff Temperature coefficient -40 °C < TJ < +125 °C - - Tcoeff_ vrefint + 50 ppm/ °C 0 °C < TJ < +50 °C - - Tcoeff_ vrefint + 50 PSRR Power supply rejection DC 40 60 - dB 100 kHz 25 40 - tSTART Start-up time CL = 0.5 µF(4) - 300 350 µs CL = 1.1 µF(4) - 500 650 CL = 1.5 µF(4) - 650 800 IINRUSH Control of maximum DC current drive on VREFBUF_ OUT during start-up phase (5) -- - 8 - mA |
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