ADPD4100 Peak Sampling Rate

Hello ADI support team! Quick question for you -

I'm trying to get a ballpark for how many samples per second this AFE can achieve across all channels, though I know the slot timing configuration registers depend on the number of repeats, pre-width, offset, etc. In the ADPD4100 datasheet I see that the peak sampling rate is listed as 9kHz when using the internal 1Mhz low-freq oscillator (pg 1). 

Where does the 9kHz number come from? Is this 9kHz times 12 timeslots = 108k samples / sec?

Thanks very much for your support!