initialguess/noisecountermeasures

Noise Countermeasures with the AVR64DD32

This demonstration show the powerful noise suppression features available for ADC input on the AVR64DD32. The input signal is fed through a sample-and-hold circuit ensuring that the voltage to the ADC is held at a constant level. By sampling in bursts, a configurable number of conversions are accumulated and dramatically increase the signal to noise ratio. A sample delay can be used to tune the burst sampling frequency away from any harmonic noise aliased from the sampled signal.

Related Documentation

• AVR64DD32 Datasheet
• AVD64DD32 Curiosity Nano Hardware User Guide
• Curiosity Nano Base Board Hardware User Guide
• Signal and Noise Generator
• AN2551 - Noise Countermeasures for ADC Applications

Software Used

• MPLAB® X IDE 6.0.0 or newer (MPLAB X IDE 6.0)
• MPLAB XC8 2.40.0 or newer compiler (MPLAB XC8 2.40)
• MPLAB Code Configurator (MCC) 5.1.9 or newer (MPLAB Code Configurator)
• MPLAB® Data Visualizer (MPLAB Data Visualizer)

Hardware Used

Setup

Configuration

Option #1:

Easy setup - upload the pre-compiled binary:

• Download the repository
• Drag-and-Drop Program the AVR64DD32
  • Plug Curiosity Nano into windows and it will show up under File Explorer
  • Put .hex file (in dist folder) into Curiosity Nano folder in File Explorer and it will automatically program itself

Once the steps above are completed, continue to the Operation Section to see how to operate the demo

Option #2:

Operation

Summary