AnsweredAssumed Answered

Is there a minimum serial clock rate for the AD9910?  I am trying to communicate with it via the SPI interface.  I'm using a National Instruments digital I/O device that has 5V logic outputs with an Adafruit level shifter board to shift the logic levels t

Question asked by djh on Nov 28, 2017
Latest reply on Nov 28, 2017 by KennyG

Is there a minimum serial clock rate for the AD9910?  I am trying to communicate with it via the SPI interface.  I'm using a National Instruments digital I/O device that has 5V logic outputs with an Adafruit level shifter board to shift the logic levels to 0 and 3.3V (for compatibility with the AD9910).  My signals and timing look great, but the AD9910 doesn't respond to any of my serial writes.  The NI I/O device is limited to fairly slow speeds so I'm well below the 70Mbps spec in the data sheet.  I've got the EXT_PWR_DWN line set low,

Outcomes