Thank you for your answer Sampath @SampathS_11.
I must say that this feature (the lowest clock frequency admited) is presented in a way that seems to be inconsistent in the datasheet (LPF2 V4.10) .
Let me explain:
- On tables 3 and 4 it indicates that the minimum corner frequency (assuming a Butterworth filter as a case study) is 1KHz, with an oversamplign ratio (OSR) of 100 times. Therefore, the sampling frequency should be 1KHz x 100= 100KHz (and the corresponding column clock of 400KHz).
- In the section Features and Overview, it says that the corner frequency ranges from 20Hz to 180KHz. This contradicts what tables 3 and 4 state.
- The table (whithout nubmering) between tables 4 and 5 depicts a filter configuration having a sample frequency of 12KHz, which again conflicts with the content of tables 3 and 4.
- The section Operational Limits says that the corner frequency has been tested down to 10Hz with an OSR of 100 times. This implies a sampling frequency of 10Hz x 100=1000Hz. This contradicts what is stated in Features and Overview, and tables 3 and 4.
I would like to ask you if you can kindly clarify these issues or indicate a correct way to interpret the documentation of this module.
Thank you in advance