Residual Impedance Impact on MAX30001 Accuracy for Bioimpedance Applications

In this work, the accuracy of the MAX30001 integrated-circuit for impedance measurements in conditions with series residual impedance between excitation and sensing leads (representative of bioimpedance applications) is characterized. Resistance and reactance measurements of 2R -1 C configurations with| Z| <; 200 Ω in the frequency band from 1 kHz to 128 kHz are collected with residuals from 0 Ω to 10 kΩ. In comparison to reference measurements without residuals, larger residual impedances decreased the accuracy of the MAX30001 reported measurements with the worst case observed for 10 kΩ.