MPU6000 Sampling rate

Hello,

With regards to the acceleration sensor:

I configured the sample rate divider to 9 resulting in an 800Hz sampling rate (with DLPF=0).

According to the sigma-delta A2D, the data is sampled at very high (unknown) frequency and gets decimated to the user-defined sampling rate using a single pole pre-decimation.

My question is: is the sampling rate of 800Hz (SMPL_RATE=9, DLPF=0):
1.Decimated from the unknown, very high, sampling rate of the sigma-delta A2D
OR
2. Because we discuss the acc sensor, the max sampling rate is 1000Hz and the 800Hz is actually decimated from 1000Hz (even though DLPF=0).

For example, an interference at 1200Hz would result in the following aliasing frequency:
1. 400Hz in case the data got decimated from the unknown very high A2D frquency
2. 200Hz in case the data was first decimated to 1000Hz and then to 800Hz.

John