SPRUJ79 November 2024 F29H850TU , F29H859TU-Q1
The following equations can be used to derive a theoretical filter output of an SDFM filter output for both a comparator filter and a data filter.

Where:




For example, when using the AMC1306x25 modulator:
| AMC1306x25 | Vclipping = | 320mV |
| Input voltage (AINP - AINN) = | 100mV | |
| SDFM filter settings | Filter type = | 3 |
| Comparator OSR (COSR) = | 32 | |
| Data filter OSR (DOSR) = | 100 |
| Density of 1s in bit stream | Using Equation 30 | 0.65625 |
| Comparator filter output | Using Equation 31 | 21504 |
| Filter type = Sinc3 | ||
| COSR = 32 | ||
| Data filter output (32-bit) | Using Equation 32 and Equation 33 | 312500 |
| Filter type = Sinc3 | ||
| DOSR = 100 | ||
| Data filter output (32-bit) | Using Equation 34 | 9765 |
| Filter type = Sinc3 | ||
| DOSR = 100 | ||
| (Right shift by 5) |