ADS1158: Layout - Board Layers

Part Number:ADS1158

Hello All,

For a new project my customer wants to use ADC1158.

Questions:

1) Is the component still active or it has any longevity issues?

2) Regarding the layout, on more recent ADCs (such as the ADC ADS114S08) it is recommended to combine the analog and digital mass layers in a single layer instead of creating the layers separately and join them in a single point, as we usually do.

Making a single layer is the best practice for this ADC as well?

Many Thanks,

Antonio