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Questions on SPI of AD5760

Hi all

This is my first time to build a four-layer board with a such high-precision DAC. I made the system and it does not work. I do not know what is wrong.

Could you please kindly help me to check the SPI?

Attached files are the timing diagram captured about CLK VS SDO; CLK VS SYNC*; CLK VS LATCH*.

I am trying to use the gain*2 mode.

The first SPI code is 0x200000, which is the configuration code.

The second SPI code is 0x1fff00, which is to write the DAC register and then the DAC will be latched.

Thank you very much.

Regards

Richie

spi_pics.rar.zip