Tool/software:
Hi,
In the ADS1263 datasheet it is stated that using the FIR digital filter we have the combination of:
- First stage filter, 'sinc5' shape, with output rate of 14 400 SPS (fig 9.15) using internal oscillator
- Second stage filter with output rate of 600 Hz
- Then FIR stage with output rate of 20 SPS and shape is in Fig 9.22
The problem is that we don't know the filter response of the second stage is this configuration : we know it decimates from 14 400 down to 600 SPS but with what frequency shape ?
Is figure 9.22 a combination of FIR stage + second stage or only the FIR stage ?
Has the second stage a 'sinc1' filter shape ?
What is the overall filter shape from input to the FIR output at 20 Hz ?
Thank you.
