Other Parts Discussed in Thread: REF5045
Hello,
I'm designing a design with ADS131A04 for current/voltage protection&metering application.
I plan to use adc @10ks/s sample rate and to fit all the signal dynamic I will need to be 20bits enob. Then I use an external voltage ref: a ref5045 (the max ref voltage for ads131a04 is 4.5V so I use the max ref voltage to optimize voltage input dynamic). I plan to use ads131 with a single rail voltage : 5VDC and create a virtual gnd. Question: with a 4.5V external voltage ref is the virtual gnd 2.25V or 2.5V ? I imagine with a 5VDC analog supply and a 4.5V external voltage ref the input range is 0 to 4.5V with a 2.25V virtual gnd, but I doubt about that, can you light my design ?
Thanks for help!
Best regard, Florian