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CCS/TMS570LS3137-EP: TMS570LS3137-EP internal ADC

user5269270
Intellectual 705 points
Part Number: TMS570LS3137-EP

Tool/software: Code Composer Studio

Hi,

in my project, we have adc input's i have attached sceenshot of that,

ADC input is working fine for those channels AD1,AD2,AD3,AD6,AD7,AD8,AD9 .

It is not working for AD0,AD4,AD5,AD10,AD11. On first conversion AD0,AD4,AD5,AD10,AD11 channels is reading correctly. and next time not coming proper.

input is fine and monitored ADC input pin.

pl guide me to solve me this issue.

Thanks and Regards,

Anand Kumar 

  • 0
    TI__Guru**** 196306 points

    Hello，

    #11 channel is not selected in your configuration. 

    What are input voltage level for 6V input monitor and 27V input monitor? The valid range for ADC input is 0V~5.25V (for Vccad=5V).

    Why the a 4.7KE (?) resistor is added to ADREFLO, which means the ADREFLO might be zero.