Hi,
I configured the 14‑bit ADC for internal temperature sensing, but the RTD temperature sensing macro is defined only for 12‑bit resolution and uses a 12‑bit temperature instance in Adc_Sar_Ip.h and Adc_Sar_Ip.c. Because of this, the calculated temperature, raw ADC reading, and measured voltage are oscillating and not correct. Should the RTD function automatically switch to 14‑bit when I configure 14‑bit ADC, or do I need to define a 14‑bit resolution macro and update the API function manually? here by attached images for your reference.
Hi
The note[4] of section 10.1 SAR_ADC if S32K3 DataSheet Rev13 list:
TUE spec for precision and standard channels is based on 12-bit level resolution.
There is no TUE spec based on 14-bit level resolution. Therefore, the RTD temperature sensing macro is defined only for 12‑bit resolution and uses a 12‑bit temperature instance in Adc_Sar_Ip.h and Adc_Sar_Ip.c. You need to modify the RTD API yourself.
Please note TS_TADCSA (Required ADC sampling time
There are 2 methods to reduce the instability of TempSensor CH conversion data:
1.The ADC conversion clock can be set as Module_Clock(Core_CLK 160MHz)/4=40MHz.
2.The ADC Sample Time can be increased instead of using the default value. (Increase the value of Adc Unit Normal Sampling Duration)
Best Regards,
Robin
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