Reading ADC problem

[nitin_kanani]

Hello,

ADC driver version : 2.3.1.

I have used ADC0 channel number 4 and 5.

Issue : If I change the value of channel 4 using potentiometer than it affects channel number 5 too.
So I didn't get actual result of channel number 5.

I have attached source code. Please check/review it. ADC related file is fsl_adc_basic.c.

Kindly let me know if anybody have faced the same issue before. Does anyone have solution for the issue?

Regards 

Nitin Kanani

[jeremyzhou]

Hi Nitin Kanani,

Thank you for your interest in NXP Semiconductor products and
for the opportunity to serve you.
According to your statement, you suspect that the ADC channel 5 conversion result is not right, as the ADC channel5 will affect it, is it right?
I was wondering if you can introduce the complete testings you did and the results. It can help to figure the phenomenon out.

Have a great day,
TIC

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[nitin_kanani]

Hi,

thanks for your quick reply 

If i increase input of ADC channel 4 parallel then  ADC channel 5 also increase decrease.

Thank You

Nitin Kanani

[jeremyzhou]

Hi Nitin Kanani,

Thanks for your reply.
I do some testings on OM13098, as you mention, tuning the voltage of ADC channel 4 will influence the ADC channel5 conversion result when ADC channel5 is floating, however, I find that this influence is ignorable when the ADC channel5 connect a sample voltage signal.
Have a great day,
TIC

-------------------------------------------------------------------------------
Note:
- If this post answers your question, please click the "Mark Correct" button. Thank you!

- We are following threads for 7 weeks after the last post, later replies are ignored
Please open a new thread and refer to the closed one, if you have a related question at a later point in time.
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