2024-09-01 12:55 AM - last edited on 2024-09-01 05:26 AM by Peter BENSCH
2024-09-01 01:35 PM
> 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
2024-09-02 05:41 PM
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.
2024-09-02 05:57 PM
Thank you
2024-09-02 06:12 PM - edited 2024-09-02 06:12 PM
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.