I have a question regarding the SPI timing for the AD5422 in Daisy Chain mode vs. Read/Write in normal standalone mode. Here is a copy of the Timing characteristics from Rev O. of the datasheet:
Question 1: Why is T5 in write mode 5uS, while in daisy chain mode (T25) it is 40nS. Is this a typo? I would expect the daisy chain to be the same, if not longer.
Question 2: It looks like write operations can have a clock of up to 30.3MHz (T1), while read can have a clock up to 11.1MHz (T11). Do all daisy chain operations (read/write) require a clock <= 11.1MHz (T21)?