LPC 1114 ADC Interface

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by diodedan on Sat Sep 18 18:23:40 MST 2010

I have two questions:

1) It looks like the ADC of the LPC 1114 is only a single supply ADC (no differential mode). Is this true, or am I missing something?

2) I am using a single supply analog system referenced at Vcc/2 (3.3/2  = 1.65V). I would like to have my output codes read as if they were referenced at zero. I am thinking that at startup, I should read the ADC a few times, average it, and use this as a constant factor to subtract from my ADC reading.

Does anyone have any suggestions/experience with this matter?

Thank you,