@harry123 wrote:
- Can I know what is difference between internal adc of STM32f429 disc1 board and an external 12bit 1MSPS adc.
You can read the specifications of the internal ADC in the STM32f429 datasheet
@harry123 wrote:- Which adc to use for any application that needs more accuracy whether I should go for external or internal adc.
That's extremely vague - impossible to answer.
But note that the low-cost evaluation boards like Disco & Nucleo are not optimised for high-precision analogue...
@harry123 wrote:- Will internal adc produces any noise compared to external.
In general, internal ADCs in any microcontroller will tend to be subject to some noise from the other internal digital circuitry.
But by far the biggest influence will be in your design of the external power supply and signal handling - which applies to both internal and external ADCs.
Check out the STM32f429 Product Page - there are Application Notes on achieving optimum analogue performance...
