test of ADC INTERLEAVE,S32K144

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test of ADC INTERLEAVE,S32K144

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shaun_yue
Contributor I

Hi community

When I use ADC INTERLEAVE mode to get the value,  the resault can not get a same value. 

Example: using PTB0(ADC0_CH4、ADC1_CH14), make sure the ADC settings are correct and the 

SIM_CHIPCTL[ADC_INTERLEAVE_EN] is enable, but the value are not same . (I changed it in "adc_swtrigger_S32K144")

S32K144 and S32K148 ,I tried both chips and both had this problem.  What  causes  this? 

Thank you for help!

 

 

shaun_yue_0-1704934791848.png

shaun_yue_1-1704934845671.png

 

 

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danielmartynek
NXP TechSupport
NXP TechSupport

Hi @shaun_yue,

The difference in the results is just 1 - 2 LSB

LSB = 5V / 4096 (12bit resolution) = 1.22mV

This is within the specs.

danielmartynek_0-1704963143060.png

 

Regards,

Daniel

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