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Original question:

AFE4300: Pls. Verify

AFE4300: Reference Resistors

Abhinav Nagaraj
Prodigy 205 points
Part Number: AFE4300

Can i get to know which are the reference resistors Rx and Ry mentioned in the impedance measurement document and also what are the optimum values and where do they have to be placed ? (link attachedimpedance measurement.pdf) Since In the datasheet there is one gain resistor mentioned. 

  • 0
    TI__Genius 12575 points
    Hi Abhinav,

    The reference resistors are connected in calibration channel ( i.e. RN0, RN1, RP0 and RP1 along with their sense terminals VSENSEM_R0, VSENSEM_R1, VSENSEP_R0, VSENSEP_R1).
    Values of these resistors should be such that they cover the range of intended body impedance measurements.


    Regards,
    Prabin.