I'm building a RS485 transceiver module and I wanted to isolate the power and data. I am going for a solution wiht a digital isolator (such as TI ISO7721DR) and a power isolator followed by a RS485 transceiver on the isolated side, but everything needs to be really cheap and very small in terms of height because of mechanical constrains.
I have eliminated RS485 transceivers with built-in signal and power isolation (such as Analog ADM2682E) because they are insanely expensive, from $9 to $15 a pop.
I am then looking at solutions like the TI SN6501, but they require transormers that are absolutely massive in terms of height and overall board area.
Is there any solution that would be suitable for that?