ISOM8111: Ternary Output?

Hi Johnny, 

There is no option for ISOM811x to be used as "0, 1, High-Z" since it won't have a formal tri-state buffer. However, -1, 0, +1 may be possible using the ISOM8111 (or ISOM811(5-8) for bidirectional input). However, I think the answer will depend on what you need the output/control signal to be. I took a swing at simulating this using PSPICE for TI. 

Below shows a simple operation where ISOM8110 will track the input signal and is decoupled using a series capacitor to get a +V or -V state. The input voltage will also match any intermediate state to match a 0-crossing. 

Let me know if this is a good start or not. 

Best,
Andrew