About Lin Zi

Lin Zi · 2018-05-29

Posted on May 30, 2018 at 06:24Hello ST engineers,I have some questions about ADC of MCU STM32F302RC, please help to answer.In our application, operating voltage of MCU is 3.3V (VDD=VDDA=3.3V). In firmware, we want to use VREFINT of ADC to calculate...

Lin Zi · 2017-06-29

Posted on June 29, 2017 at 13:50Hello ST engineers,According to the MCU (STM30F303RCT6) datasheet, the absolute maximum rating of IO's Vin is 4.0V (page 56).In our application, operating voltage is 3.3V (Vdd=Vdda=3.3V), but the input voltage of PA0 ...

Lin Zi · 2018-05-30

Posted on May 30, 2018 at 09:23hello T J,yes, protection function should be always kept in mind when do designing.our test circuit is very simple, just use a resistor divider (30K and 10K, made a ratio 1/4) to convert the external input voltage 0-10...

Lin Zi · 2018-05-30

Posted on May 30, 2018 at 08:44hello AvaTar,OK, I see.use a zener diode (3.0V) is also the method what we adopted to solve this problem finally. thank you for your suggestion.as long as the ADC input voltage is less than 3.66V (according to our test...

Lin Zi · 2018-05-30

Posted on May 30, 2018 at 08:33hello T J,Thank you for reply.1), first, I don't know if the diode can be conducted because of I don't know the Vf of the protection diode.2), second, even the diode is conducting, why the VDDA is lifted? from the test...

Lin Zi · 2018-05-30

Posted on May 30, 2018 at 07:55Hello Avatar,Thanks for reminding, this is a forum, any engineer can read this problem and can answer.Yes, because in the application, the condition of beyond specified limits can also happen, when the condition happen...

Lin Zi · 2017-06-30

Posted on June 30, 2017 at 08:26Hello Zhitai,how to do?in our circuit, the cathode of the clamping diode is connected with 3.3V, while the anode connected with the signal after resistor divider.

User statistics

User Activity

Monitoring the internal voltage reference

IO limit voltage of STM32F303RCT6

Re: Monitoring the internal voltage reference

Re: Monitoring the internal voltage reference

Re: Monitoring the internal voltage reference

Re: Monitoring the internal voltage reference

Re: IO limit voltage of STM32F303RCT6