AFE4405: afe4900

Dear all,

  We are designing new product for NIBP (estimation from PPG and ECG). I saw  afe4405 that has two PD inputs and we want one is for ECG and the other is for PPG for synchronized  two signal as the following:

The questions:

1, Any suggestion for the above design? (I think the "Time-Multiplexed Photodiode Inputs" is a big challenge for ECG. ) 

2, Anyone can share me full data sheet of AFE4405 and afe4900?

Thanks,

Andy