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21ic问答首页 - stm32f303cct6中Vbat内部两个电阻是50k,有范围值吗

BAT 电阻 STM32F303 TI TE IO

stm32f303cct6中Vbat内部两个电阻是50k,有范围值吗

xsq21dz2021-03-30
Table 80. VBAT monitoring characteristics

Symbol Parameter Min Typ Max Unit
R Resistor bridge for VBAT - 50 -
Q Ratio on VBAT measurement - 2 -
Er(1)Error on Q -1 - +1 %
T
S_vbat
(1)(2)
ADC sampling time when reading the VBAT
1mV accuracy
2.2 - - µs
1. Guaranteed by design.
2. Shortest sampling time can be determined in the application by multiple iterations.

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