With IV sense function disabled, customer's system worked well.
WIth IV sense enabled, customer observed noise at these frequencies:
- 2.4Hz (Large amplitude swings, leading to audible amplitude cycling at 2.4Hz)
- 58.5Hz (constant humming)
- 125KH & 180KHz (no issue, not audible, just for info only)
This was measured using 8KHz sampling, 1KHz test tone, BCLK = 1.536MHz.
What can cause such type of noise to be introduced, only when IV sense is enabled?
- I have schematics, scope captures, layout available for offline discussion.
