The Godfather talking
You can run, but you can't hide.
Sonsivri
 
Home Contact Us Help Search GoogleTagged Donations Login Register
*
Welcome, Guest. Please login or register.
Did you miss your activation email? 		December 23, 2024, 04:17:52 04:17


Login with username, password and session length


Sonsivri > Electronics > AVR, 8051 Family and ARM Area (Moderator: bbarney) > LPC1768 ADC REF
Pages: [1]
« previous next »
Print
Author Topic: LPC1768 ADC REF  (Read 5561 times)
0 Members and 1 Guest are viewing this topic.
zaalzaalak
Newbie
*
Offline Offline

Posts: 25

Thank You
-Given: 12
-Receive: 47
« on: July 26, 2010, 09:50:53 09:50 »
Can I connect a 2.5V reference voltage to VREFP,and then connect VREFN to GND ? Is this working for LPC1768 ADC?
or I should connect VREFP to 3.3V supply and VREFN to GND?

Please help me.
Logged
jestanoff
Junior Member
**
Offline Offline

Posts: 46

Thank You
-Given: 25
-Receive: 18



WWW
« Reply #1 on: July 27, 2010, 07:46:33 19:46 »
Both options are possible but the accuracy of the ADC and DAC are dependent on fluctuations of voltage between these two pins. So unless you need high precision measurement use 3.3v power supply with L/C appropriate filter.
Logged
ktek
Junior Member
**
Offline Offline

Posts: 39

Thank You
-Given: 10
-Receive: 5
« Reply #2 on: October 21, 2010, 09:11:58 21:11 »
in some cases is better to connect VREFP to 3.3v power supply, with own voltage fluctuations
Eg when you measure ratiometric sensor supply by 3.3 V
like potentiometer, straig gauge brige, passive pressure sensor  etc.
Fox mixed application (ratiometric nonratiometric) is useful to measure  3.3V too
and refer it all nonratiometri measures



 
Logged
Pages: [1]
Print
« previous next »
Jump to:  


DISCLAIMER
WE DONT HOST ANY ILLEGAL FILES ON THE SERVER
USE CONTACT US TO REPORT ILLEGAL FILES
ADMINISTRATORS CANNOT BE HELD RESPONSIBLE FOR USERS POSTS AND LINKS

... Copyright © 2003-2999 Sonsivri.to ...
 Powered by SMF 1.1.18 | SMF © 2006-2009, Simple Machines LLC | HarzeM Dilber MC