Hi,
I have an application with 64 0-3V analogue signals connecting board-to-board, bandwith ~10kHz, distance ~10-15cm / 4-6 inches, into a 50 ohm load. I need to minimise crosstalk/coupling as this is causing a problem right now. (The existing cables are unshielded ffcs with signals side-by-side.) This is for rapid prototype / small quantity so preferably needs off-the-shelf parts. I need to measure signals with max 10,000x / 80dB voltage ratios i.e. the smallest signal is about 0.3mV.
I know I could experiment and measure each possible solution, but:
+ Does anyone have a go-to solution for this kind of application?
+ Does anyone have any experience / opinions on which one of these options (or others) might work best:
(1) Shielded FFC / shielded ribbon with each alternate connector GND? (I can see shielded FPC connectors from SMK & Hirose but not shielded FFC. Also, I can see shielded ribbon from Amphenol & 3M but not shielded IDCs.)
(2) Multi-way shielded twisted pair?
TIA, Alan