Hi analog Team I am happy the the 32:1 analog multiplexer of yours. Much more possibilities than the ADG738 8:1 mux.
However ADG738 has a Dout pin that permits a Daisy chain well described in the datasheet. But how on earth didn't you use one of the NC-pin (Not Conneced, or testable pin of yours, who knows..) in order to output the spi-data wire ?!
Am I the only one who need to multiplex two times 128-pin into one ? I doubt.
What solution do i still have. Yeah, 8 chip select on 8 ADG731 to drive my 128-differential signals.
I would have prefer to use one ChipSelect (or |SYNC as you call it). I know Daisy chain has its drawback, but at least you could provide it.
My real question is : by any chance, is there one of the 8-NC pin #[15,16,20,21,22,44,42,41] that is in fact the Dout ?
Thanks in advance for anyone answer.