HMCAD1511 dual-channel operation

Hi - In dual-channel operation, can the HMCAD1511 run directly off a 500MHz input clock for two-channels at 500MSPS? Or is the maximum sampling rate 250MSPS in this configuration?

For example: with 500MHz input clock, is clk_divide =1 and operating_mode = 2 channels an allowable configuration?

Eric