Is AD9163 input data must complex?

No, it can be be either real or complex data. The maximum data rate for real data is 5Gsps and the maximum data rate for complex data is 2.5Gsps.

In order to use any of the digital signal path, filters, interpolators, quadrature modulators, etc, the data must be complex.

thanks,ask another question,Is ad9163 must use interpolator? I see datasheet 110 register,not find 1x mode(bypass).

Yes, you the minimum interpolation rate is 6 and the max is 24.

Because the minimum interpolation is 6x, yes, the input data must be complex data. There is no real data mode (1x bypass) on the AD9163.

Because the minimum interpolation is 6x, yes, the input data must be complex data. There is no real data mode (1x bypass) on the AD9163.