DAC34SH84 Phase delay between input and output

Scott,

The delay through the DAC can be calculated as digital latency + output propagation delay. The digital latency will depend on the digital circuits used in the design. Page 13 of the datasheet specifies the digital latency for each interpolation setting. You can then add additional latency from circuits such as fine mixer, QMC, and inverse sinc.

After the signal is process on the digital side, the digital code are updated on the analog side (from decode logic) with some propagation delay Tpd. You can add this number to the digital latency for the total delay through the DAC.

You are correct that the 750MSPS of data rate is per channel. The AB channels shares the same 16-bit input bus (same applies to CD channels). The data is transferred in DDR fashion with up to 1.5GSPS of LVDS toggle rate (Finterl) to achieve 750MSPS of input data rate per channel.

-KH