The AD7380 datasheet specifies that the data rate is 4MSPS. However, the diagram on page 7 appears to show a data rate of 8 MSPS when in "serial 2-wire" mode.
Is the 4 MSPS specification for a single ADC or for both ADCs together? What is the total data rate for this chip?
Datasheet - www.analog.com/.../AD7380-7381.pdf