1764 ADC reference voltage

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by samc on Sat Jul 10 15:09:53 MST 2010

Id like to do Li-charging with the LPC1764 (surely it iwll do other things mainly :D)

So I need a precise reference for the ADC; my 3.3V is not very accurate, is form a DCDC.

It would be cheapest to connect a TL431 (2.500V) to the VREFP pin, but I am not too sure it this is allowed or not. The manual mentions it _should_ be equal to VDDA...

Does anybody know more about this issue?