I am using the EVAL AD5933 EBZ evaluation board with resonance PZT sensors. I am having a problem with the resonance part in the graph as it is flattening. Please find the graph as an example.
Can you kindly tell me why and how can eliminate this problem?
I thank you in advance.
What is the frequency you are interested?
Could you provide more details like expected max/min impedance, Rfb and Rcal, please?
Thank you for your email.
The interested frequency is between 60 and 100 kHz. The Rfb and Rcal are 2950 ohms. The expected impedance is between 2000 and 10000 ohms.
Do you know the expected theoretical impedance plot?
Did you measure the impedance with a different equipment?
I've tried the AD5933EBZ on a number of computers, and all have failed for lack of a USB driver. Running in compatibility mode never seems to help. I assume this is because the board has very limited OS support and even more limited driver support. I'm trying to evaluate if this device can be used to optimize the matching network for ultrasonic sensors. Can you give a list of supported OSes and/or drivers?
The EVAL-AD5933EBZ GUI operates in W XP and W7.
We are working to support W8/10 in the future but currently the drivers do not support this OS.