10,000 measurements at what resolution ? 20 bits, 18, 16, .....the DelSig has limitations of sampling
rate vs resolution. Are you seeking absolute accuracy or relative accuracy ? The SAR is capable of 1Msps
at 12 bits.
You will need to do CDS -
http://www.cypress.com/?rID=49159 AN66444 - PSoC® 3 and PSoC 5LP Correlated Double Sampling to Reduce Offset, Drift, and Low Frequency Noise
Consider also using the DFB for filtering.
Lastly at 4 mOhm you have some serious connection issues in terms of thermoelectric
generating connections -
Welcome in the forum!
The PSoC5's SAR has got 12 bit resolution and can easily handle >500 ksps.
The DelSig ADC reaches with 17 bit resolution up to 12000 sps (@16 bit >40ksps)
so this wil satisfy your needs and gives some room for filtering (averaging) noise.
What are you going to do with the results? When thinking of transmitting via an interface think of the needed bandwidth.
Thank you so much , I thought 12 bit or 16 bit resolution and I will check and try to apply them
Thanks Bob , I thought 12 bit or 16 bit resolution. What I need to do is , I need to read the voltage value from shunt resistor and amplify it , convert it and make power consumption calculation.
Additionally this handbook has many recommendations for low level noisy measurements.
Are you measuring AC power line current ?
Untitled.jpg 50.1 K
Thank you again Dana , Yes I am measuring AC power line current