The logic on the digital out DOUT1 data output of the ADC is only on this signal for the purposes of the EVM since this is the data output pin that is used for the TDM mode.For individual outputs, you would need extra circuity as required. Keep in mind that depending on your processor and SCLK speed, the logic may not be required. You can use the datasheet timing specs to determine the necessity.
If you are looking at EKG application, have you considered the ADS1298? This family of parts is specifically designed for EKG applications.