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Read +2.5v and -2.5v adc value | Cypress Semiconductor

Read +2.5v and -2.5v adc value

Summary: 5 Replies, Latest post by odissey1 on 23 Sep 2016 10:07 AM PDT
Verified Answers: 0
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user_491123998's picture
User
72 posts

Hello

Please tell me where i am doing mistake ,

here i make AGND p2[4] pin and connect through 10k+10k voltage divider. and reading through P0[1] pin.

adc not working 

user_1377889's picture
User
9839 posts

I have not the lightest clue with your description how you do a level shift to get the ADC input into the range 0..5V. Can you supply us with a schematic scetch?

 

Bob

user_491123998's picture
User
72 posts

by DEMUX i am selecting adc point and 0v to 5v its is working  but now i have to read 0v to -2.5v . i am not able to configure it properly 

user_1377889's picture
User
9839 posts

You need to level shift your negative input using a resistor ladder. Read this article. Sorry, I couldn't find the excel file, you have to search for yourself.

 

Bob

user_342122993's picture
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606 posts
user_242978793's picture
User
1107 posts

Your files are not a PSoc Creator file set.  Please send them correctly.

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