Other Parts Discussed in Thread: FDC1004
Hello,
I'm working on an application that involves >4 channels, so it would require the use of at least two FDC2214 chips.
While the 4 channels of each chip are offset in time, there's no way to synchronize between two of them to make sure they aren't exciting their sensor lines at the same time.
While shielding could help with crosstalk, the sensors do have to come in fairly close proximity to each other.
If the LC tanks on each were to be configured to have different base frequencies, such that the resonant frequencies would not overlap over the sensor variable range, would that be an effective way to mitigate crosstalk? Is there a better way?
E.g. FDC0 has 18uH/33pF tanks and FDC1 has 18uH/20pF tanks. If they both have the same sensors with ranges that don't overlap in terms of total tank capacitance, they should never occupy the same frequency range.
Thanks!