ADS8568: AD8658 power and interface

Part Number:ADS8568

Dear TI,

I have attempted to design a circuit for the ADS8568 and would appreciate a review and design guidance.

My design goal for this is to use the parallel interface to a microcontroller and sample from 8 channels simultaneously at maximum speed. Input signals are in the range 0-3.3V centered at 1.65V.

My main worries:

1. On each analog input, I have this circuit which only has 49.9 ohms of resistance and a 10nF capacitor. I will probably replace the 10nF capacitor with 4.7nF to get the -3dB frequency above the sampling rate, but would appreciate any recommendations. My understanding is that this amplifier must be powered after the ADC. Should I add an extra resistor to limit current into the ADS8568? Is the extra input filtering capacitor unhelpful due to the internal capacitance?
   
2. What power sequencing is required? Right now my ±5VB supplies become active two seconds after AVDD and DVDD, is this okay?
3. Can I operate this device with ±4-VREF and a 2.5V reference from this ±5V HVDD/HVSS supply or do I need more overhead?
4. My read is that the RESET line needs to be held low in normal operation. This is flipped from most RESET lines so I wanted to confirm before hardwiring.
5. Should I instead use a choke on DVDD rather than a 10 ohm resistor?
6. Should there be a 10uF capacitor in addition to the 100nF capacitor for HVDD and HVSS?
7. I am going to use the PM version without the pad underneath. Are there recommended ground plane connections in this situation? Should I avoid running any traces under the chip and leave that as a continuous ground plane?