ADC offset using PSoC 5 on CY8CKIT-001 | Cypress Semiconductor
ADC offset using PSoC 5 on CY8CKIT-001
I am trying to read the analog value output from a LM35 temperature sensor. I am reading the value received with the ADC, but I constantly get an offset of almost 1mV. This is problematic for me, since I am evaluating the PSoC devices for use in future products.
I am using a single ended delta sigma ADC with the following settings:
Conversion mode: Multi sample
Resolution: 16 bits
Conversion rate: 10 000 SPS
Input range: Vssa to Vdda (even though changing the range didn't do anything to my faulty reading)
Buffer gain: 1
Buffer mode: Rail to Rail
Reference: 3.2910V (As measured at Vdda)
I saw a demo where they got uV precision. Is it possible to get this kind of precision with this dev kit? How can I ensure precision when I produce my own PCBs?
Your help is appreciated.