LPCXpresso IDE中的主题 Re: ADC Coversion ...

ADC Coversion ...

lpcware — Thu, 16 Jun 2016 02:00:04 GMT

Content originally posted in LPCWare by cesimkaol on Fri Feb 25 07:28:05 MST 2011
Their friend , I was a Pxx16fxxxx user before have been met with lpc...
That is amazing mcu and ı have started to proramme it .

I know my english going to make you mad )) but I could not find any information in my own ,I am preparing usermanual about LPC in my own language so need your helps...

Furtheremore I could not find where is that Vref pin, how can we supply Vref? or is it standart 3.3V?

In order to read LM35 , I have to calculate Voltage and this adc is 12 bit and everythings depends on Vref...

if is it standart 3.3 vo then 111111111111=3.3V and 000000000000=0v in case it is 3.3V and 1 step responds 0.805 mV,on the other hand can I supply it with different voltages for ex 5V then

111111111111=5 and 000000000000=0 :)
or 000000000001=1.22 mV

so when adc generate 00001111111111= 1.22mV*1024 = 1.249 V in case Vref=5V..

is any adc experienced or trained friend here?Tell me how did you do it ))
I have problem with hardware :(

Re: ADC Coversion ...

lpcware — Thu, 16 Jun 2016 02:00:05 GMT

Content originally posted in LPCWare by Ex-Zero on Fri Feb 25 07:47:26 MST 2011

Quote: cesimkaol
Furtheremore I could not find where is that Vref pin, how can we supply Vref? or is it standart 3.3V?

[LEFT]Which MCU?[/LEFT]

[LEFT]LPC1768 has Vref (VREFP and VREFN pin).[/LEFT]

[LEFT]See:[/LEFT]

UM10360: LPC17xx User manual
http://www.nxp.com/documents/user_manual/UM10360.pdf

[LEFT]LPC1114 & LPC1343 use VDD as VREF.[/LEFT]

[LEFT]See:[/LEFT]

[LEFT]UM10398: LPC111x/LPC11Cxx User manual
http://www.nxp.com/documents/user_manual/UM10398.pdf[/LEFT]

UM10375: LPC1311/13/42/43 User manual
http://www.nxp.com/documents/user_manual/UM10375.pdf

Re: ADC Coversion ...

lpcware — Thu, 16 Jun 2016 02:00:06 GMT

Content originally posted in LPCWare by cesimkaol on Fri Feb 25 07:55:52 MST 2011
Oh I see thank you ....Brother