Hi All,
I am currently having troubles with the monotonicity of the DAC7613. As I step the DAC one bit at a time, its output jumps back and forth between 2.5 and 2.8V. My VREFH is +3.3V and my VREFL is +1V. The VSS pin is connected to ground.
When I reset the DAC, its ouput goes to +1V as it should (RESETSEL is low); however, when I write a 001(hex) to the input register, the DAC's output jumps to 2.5V. As I continue to increment the input register, the output voltage bounces around without any apparent pattern. Any suggestions as to why it may be doing this? Have I missed something vital in the data sheet?
Thanks,