Which parts/strategy do you recommend for isolation of ADI's 32 bits SAR ADC?

On behalf of Eric Benedict:

Which ADC are you interested in and what are your application requirements? 

The LTM2893 could be a good solution for the LTC2508-32 which is configured with pin strapping. 

The LTC2500-32 has features which require SPI write access, however it has some configurations which do not require the SPI configuration.  The LTM2893-1 variant supports SPI write, but only under certain conditions/limitations.  I am presently working on verifying the compatibility of the LTC2500-32 with the LTM2893-1.

On behalf of Eric Benedict:

Which ADC are you interested in and what are your application requirements? 

The LTM2893 could be a good solution for the LTC2508-32 which is configured with pin strapping. 

The LTC2500-32 has features which require SPI write access, however it has some configurations which do not require the SPI configuration.  The LTM2893-1 variant supports SPI write, but only under certain conditions/limitations.  I am presently working on verifying the compatibility of the LTC2500-32 with the LTM2893-1.