Init AD5761 device

Hi Christoph719 

Can you provide a zoomed-in scope shot (eg. a single transaction) so we can view the SPI transmission more clearly?
Thanks.

Regards,
Flynn

Hello, sure here are the first three bytes. I had to take another shot, so the data received is different from the first screenshot. It seems like I get more or less random responses.

The chip select / SYNC is pulled and held low for 10 us before and after the write (not shown in the screenshot). Although the device had just been switched on, I've had issued a full software reset 100 ms before trying to access the control register.

Hi Christoph719 ,

Each SPI transaction for the AD5761 should be 24-bits long to prevent erratic or random behavior.
You can refer to the "Register Details" portion of the datasheet for the register map.
Also keep in mind the timing characteristics. The SYNC time and reset seems ok but also kindly check other timing specs as well.

Regards,
Flynn

Hello, thanks for your reply. Yes I am only using 24-bits long SPI messages. Here is the full, zoomed out shot. Write command, followed by a read command and a NOP operation for the actual data read.