3 Replies Latest reply on Sep 11, 2014 12:31 AM by senthilnathanl_

    VddIOx and GPIO pins


      Can Analog output pins be routed to any of the VDDio ?


      I want 4 x DAC output with the 4V range and need Vddio of 5V on these pins but not on other pins.


      My assumption is that I can have 1 of the vdddio pins attached to 5V and the rest to 3.3V so I can have a mix of output levels?


      I have looked through several documents but cannot find specific reference to how this is done (or whether it can be done like this).


      My system needs Analog DC output from 0 to 2.5V and the DAC only has 1V or 4V option. Though I can use the 4V option with 3.3V supply,I loose resolution of the output by doing this.


      I am generating a 0-20mA output signal and want at least 0.1mA resolution. I can achieve this ok with 8 bit if I use almost full range of values. I don't want to use external op amp and gain to translate 0-1V into 0-2.5 V but ok to use simply resistive divider to translate 0-4V into 0-2.5V