Other Parts Discussed in Thread: AFE4300
Tool/software:
I use AFE4300 Device GUI to measure Serial RC Network Impedance and Complex Network Impedance. I recalibrate every time when I change the frequency or switch FWR/IQ mode. I have two questions:
1. FWR mode is stable, only 0.5 Ohms fluctuation. But IQ mode is unstable, e.g. Measure RC Network that a 550 Ohms resistor serial a 110nF capacitor, the result has 15.787 Ohms fluctuation, 2.87%.
2. Accuracy of IQ mode is bad. Especially at frequency of 8KHz, max Error of Mag was 6.9%, max Error of Phase was 34.8 degree.
The result of measure Complex Network Impedance is worse.
Is the test result correct for AFE4300? If not, did I miss something?