TMS320F28377S: How to calculate the natural frequency(the parameter of DDSRF-PLL's loop filter)

Hi Yale,

The below equation can be further expanded

as

The below term is equal to error band

After substituting error band 5% = 0.05, damping of 0.7, t equals settling time of 30ms, you can get the natural frequency.

Thanks and regards, Pawan