IDAC : Code 0xFF=31.875 or 32 uA ? | Cypress Semiconductor
IDAC : Code 0xFF=31.875 or 32 uA ?
I setup the IDAC to code FF in the lowest range. I dont need to change the current but I need to know as accurate as possible how much the current is.
The documentation says this is 31.875 but when I measure it with my precision voltage meter over a fixed resistor I get :
>> Comparing to 31.875 uA >> deviation = 0.4%
>> Comparing to 32uA >> deviation <0.1%
Tested it for as well as Sink and Source mode. Fixed resistor 100 and 220 ohm.
So my question : Is it correct that the IDAC is calibrated to 32 uA and NOT to 31.875 ?