TMS320F280039C-Q1: ADC sample error between different channels

Joe Ji

Tool/software:

Hi team

Customer use 4 different ADC channel to sample the same stable voltage signal, but the result error is ~300 LSB, How to improve the ADC sample accuracy?

Below is the test code:

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/171/ADC-channel-test-code.jfif

Thanks

Joe

over 1 year ago

0 Joseph Casuga over 1 year ago

TI__Mastermind 38530 points

Hi Joe,

The snippet does not help. It seems like SOC0-SOC3 are assigned to the same channel. What is the trigger from and what is ACQPS setting? What are the associated RC on the channel that is being sampled?

Regards,

Joseph

+1 Joe Ji over 1 year ago in reply to Joseph Casuga

TI__Expert 3980 points

Hi Joseph

Close the thread since no more feedback from customer.

Thanks

Joe

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TMS320F280039C-Q1: ADC sample error between different channels