I'm currently studying designs for a pulse oximeter for use with Arduino, I have seen two Schematic designs form the same company, https://www.protocentral.com/sensors/1113-protocentral-afe4490-pulse-oximeter-shield-for-arduino-v2-642078949425.html and https://www.protocentral.com/open-source-health/1252-healthypi-v3-basic-hat-kit-for-raspberry-pi.html . Both of them are identical and are base around the AFE4490RHAT IC from Texas Instruments. Both designs have 4 inductors : L1, L2, L3 , L4.
1) What are these inductors used for in the design?
2) In one of the designs they are using 4 CIG22L100MNE and in the other 4 LPS3010 (they don't specify the full part number) but the Samsung one seems to be discontinued and the other one seems to be not recommended for new designs, I'm trying to choose and equivalent I have compared the specifications between the two parts and a part from the inductance they seem to have very different properties regarding current rating, DC resistance and inductance frequency, what specifications are more important when choosing a replacement part?