SPRUJ17I March 2022 – August 2025 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-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 = | 320 mV |
| Input voltage (AINP - AINN) = | 100 mV | |
| SDFM filter settings | Filter type = | 3 |
| Comparator OSR (COSR) = | 32 | |
| Data filter OSR (DOSR) = | 100 |
| Density of ones in bitstream | Using Equation 18 | 0.65625 |
| Comparator filter output | Using Equation 19 | 21504 |
| Filter type = Sinc3 | ||
| COSR = 32 | ||
| Data filter output (32-bit) | Using Equation 20 and Equation 21 | 312500 |
| Filter type = Sinc3 | ||
| DOSR = 100 | ||
| Data filter output (32-bit) | Using Equation 22 | 9765 |
| Filter type = Sinc3 | ||
| DOSR = 100 | ||
| (Right shift by 5) |