Hi Ren,
The output data rate depends on the bandwidth selected. For a 500Hz data rate, you would need a bandwidth of less than 250Hz. The customer would have to determine what bandwidth they need for their application. There are several filter selections in the device. Reference the table in Section 6.2.23 and pasted below. Each filter has a Bessel equivalent response and the details are included in the datasheet. The DSP sample time is listed for each filter. 16x data interpolation is used on the output data to increase the output data rate. I have added a table below for some example filter selections.


I am not sure what the context is for “LSB 4P 800HZ”. This looks like a partial description for some settings for the part. One low pass filter option is an 800Hz, 4-Pole LPF as explained above.
Best regards,
Tomas