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Internal ADC

harry123
Senior
  • I'm using nucleo f446 board for adc sampling the internal adc is unidirectional. 
  • Is there any other development board like nucleo or discovery with internal ADC which can give both positive and negative cycle of adc
  • Please suggest me so that I can avoid external adc.
4 REPLIES 4
KnarfB
Principal III

 internal ADC which can give both positive and negative cycle of adc

do you mean differential input channels?

Check out the STM32G4 series, like NUCLEO-G474RE

hth

KnarfB

TDK
Guru

No STM32 chips can convert a negative voltage. The voltage range is always limited from 0 V to VREF+, even in differential mode. External ADCs will have the same limitation.

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  • I want to read both positive and negative cycle of a sine wave.
  • Whenever I start adc sampling only positive values are given all negative values will be zero 
  • Is there any solution 

Thank you 

The STM32 cannot convert negative voltages. Nothing can change that.

Create external circuitry to change the input to be always positive. AC coupling could be a possibility.

If you feel a post has answered your question, please click "Accept as Solution".