I want to measure the AC Current flowing through a Piezocrystal (replaced in the circuit with a resistor) being driven by a TI DRV2700. http://www.ti.com/lit/ds/symlink/drv2700.pdf This Chip puts out a differential 200Vpp and so ive decided to power it from a standard wall adapter, while the analog frontend and the AD Converter get their Power from a USB Port. The circuit reflects my understanding of the System. Is it true that with frequencys of 1khz to 10khz the Isolation capacitance will produce an error current? If so, how can i prevent this problem?