AD5621 minimum spi clock


In my application I'm using a 12 bit DAC (AD5621). Because of the bad signal integrity of the SPI I cannot go higher than 12 KHz SPI Clock.

Unfortunately the DAC does not chance his output value. It always stays at 0V. I'm asking myself if there is a minimum spi clock  frequency the DAC needs to work.

Thank you very much. 

minimum spi clock frequency instead of minimum spi clock
[edited by: Beavis69 at 3:39 PM (GMT 0) on 6 Jun 2019]