To whom it may concern,
We are facing some crosstalk issues with the AD4111 in differential voltage mode. Applying 20Vpp at one channel results in 0.6Vpp at the other three channels (3% or -30dB). The crosstalk is not only seen when the input is left floating but also if we short the input. The external circuit is as suggested in the eval board. Different tests done made us quite sure that it is not a problem on the PCB and rather inside the ADC. Are there any known problems (both with the PCB as well as with the ADC and its configuration) that could produce the crosstalk we are seeing? We did not find any numbers in the datasheet regarding the crosstalk. Because of this we do not know what to expect under “normal” conditions.
Thanks a lot in advance for your support