I purchased a AD9854 Ebay module expecting to control it by its serial interface. However the module designers had seen fit to enable only the parallel interface. It's a difference of about 16 pins vs 4-5 pins for the serial. There is also the issue of the 5v to 3.3v conversion from the Nano to the AD9854 module. So I designed a serial to parallel interface using a couple of 74AHC595 serial to parallel shift registers. The 74AHC version is 5v tolerant when run from 3.3v, and is also available in a 16 pin DIP package which meant I could use some vero board. By playing with the pin connections I was able to minimise the number of jumpers on the vero board.
I wrote some code for the Nano and it works quite nicely. I must say that the module seems to perform very well.
Connections between Arduino Nano and AD9854 Serial to Parallel Interface Board.
NANO AD9854 Interface Board(AD9854_sp_sch.pdf)
A0 RST_5
A1 CLK
A2 /OE
A3 DATA
A4 /WD_5
GND GND