For one:
Programmable output peak-to-peak excitation voltage to a maximum
frequency of 100 kHz
Programmable frequency sweep capability with serial I2C interface
Frequency resolution of 27 bits (<0.1 Hz)
Impedance measurement range from
1 kΩ to 10 MΩ
Capable of measuring of
100 Ω to 1 kΩ with additional circuitry
Internal temperature sensor (±2°C)
Internal system clock option
Phase measurement capability
System accuracy of 0.5%
2.7 V to 5.5 V power supply operation
I've placed in bold a few things which I can't answer. You also have the AD5934 to compare to.
Then there is isolation to deal with. I have one of these: **broken link removed** and you probably want battery power on the person side.
Now, the analyzer has only three leads. How does one turn that into what I would think of is needing 4 required probes? I-, I-, V-, V- similar or something like an LCR meter has HIpot, HIcurr, LOWpot, LOWcur. How much resistance can be between the leads?
Do you need to do sweeps? What frequency? Is the voltage high enough? Might this be a 4 electrode patch? Can it be done with 3?
Pay attention to PDF page 118.
I was thinking of this method:
https://en.wikipedia.org/wiki/Van_der_Pauw_method, but I could be way off base. It requires the placement of the electrodes on the edge.
The 4 point probe
https://www.electro-tech-online.com/custompdfs/2012/08/4ptprb.pdf method gives sheet resistance. Here there is 4 points in a line and the current is passed through the outer ones. Then a voltage is measured on the inner ones. Then the current is reversed to detect for non-linearities. This method finds the "sheet resistance". You need thickness to get resistivity. And again, the force and sense pads are different.
I'm missing a lot of things because I don't really know how bio-impedance is measured and I don't know how contact resistance is handled, nor do I know what to do with 4 probes and 3 wires from the IC?
Do, you need guard terminals?
Zero and short compensation measurements? How?
read this reference:
https://www.electro-tech-online.com/custompdfs/2012/08/5950-3000.pdf
I did some LCR measurements of an active device, a device that generates current, and they were really difficult
This might also be required reading:
https://www.biodyncorp.com/product/450/450.html