LPCXpresso IDE中的主题 Re: LCP11u14 ADC

LCP11u14 ADC

lpcware — Wed, 15 Jun 2016 23:45:16 GMT

Content originally posted in LPCWare by Frankb on Wed Feb 13 02:09:27 MST 2013
I want to use the ADC on a LPC11u14 microprocessor. Now I found that it has a 10 bit resolution and has an input voltage of 0.0 - 3.6V. Now I have an analog sensor that outputs 0.3 - 3.0V, which means that I would loose around a third of my resolution. Is it possible to change the range of the ADC from 0.0 - 3.6V to 0.3 - 3.0V so that I make full use of the 10 bits resolution?

Re: LCP11u14 ADC

lpcware — Wed, 15 Jun 2016 23:45:17 GMT

Content originally posted in LPCWare by madid87 on Wed Feb 13 02:22:08 MST 2013
No.

You can put an input amplifier which would translate your signal to the desired range.

Re: LCP11u14 ADC

lpcware — Wed, 15 Jun 2016 23:45:18 GMT

Content originally posted in LPCWare by ex-kayoda on Wed Feb 13 03:18:22 MST 2013

Quote: Frankb
... input voltage of 0.0 - 3.6V...

Isn't VREF = VDD :confused: So your resolution depends on your VDD. If you choose 3.0V you lose only 10% ;)