I need an analog switch to reset an integrator with very low leakage. It is a charge preamplifier for photodetection.
I want to use a guard track around the input node. I can't find a device where this is possible - the pins are too close together! So I have either the output of the amplifier or a power supply track leaking into my sense node. Not good!
If there was an SPST analog switch packaged with NC pins next to one of the switch terminals then I would have room for my guard track.
How about it, ADI? Will you be the first to offer such a great product? None of your competitors do either!
Low charge injection, leakage are also required, of course. AD1219 is what we are currently using but have a significant leakage problem which we are trying to solve by getting the PCB super-clean before conformal coating it.
Happy to discuss other characteristics.
We normally try to keep the number of no connect pins to a minimal so we do not have anything like you describe.
I am interested in what leakage levels you are targeting. The ADG1219 has a max leakage spec of 1 nA.
What leakage levels are you seeing from your PCB?