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AD7762 3rd Filter decimation vs FIR Filter

Question asked by Benure on Dec 22, 2015
Latest reply on Apr 13, 2016 by jcolao

I need to know the filters sequence for our application. The AD7762 has 3 filters. The first 2 are simple decimation filter (if I understand it right). The 3rd filter is a FIR and decimation filter with fixed decimation of 2. Is the decimation applied before or after the filter? Maybe I don't understand the 3rd filter. It makes a big difference for our application. Figure 31 in the datasheet shows a bandwidth responce of 625kHz, does it mean that the decimation of 2 is applied after passing through the FIR?

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