Where do I get documentation on the SW130 pdk? I a...
# sky130
d
Where do I get documentation on the SW130 pdk? I am looking for the core I need for design - vth spreads, Avt, sheet resistance, cap densities, etc. GF180 have it done quite comprehensively at https://gf180mcu-pdk.readthedocs.io/en/latest/analog/model_parameters/model_parameters.html. Is there a similar link for SW130? I'll be characterising these numbers first thing when I install the pdk but would be nice to have data to cross reference with.
l
SKY130 PDK’s documentation: https://skywater-pdk.readthedocs.io/en/main/
v
Search for efabless volare, it's quite easy to switch between pdk version and it's recommended for MPW shuttle
d
Just had a look through that link. However, I cant find much detail regarding modelling parameters. For example, the link I posted above for GF180 gives me much of what I am looking for. I presume data such as dvth / Avt / etc. is available for this pdk?
l
As far as I'm aware, this is what we have available regarding device characterization: https://skywater-pdk.readthedocs.io/en/main/rules/device-details.html You may also find some useful info in the SPICE models. If you manage to find a more complete documentation, please let me know.
There is some raw device data available here: https://github.com/google/skywater-pdk-sky130-raw-data/
d
Thanks. Yes I had seen that /device-details.html page, its not a lot but enough to get started. Over the coming weeks / months I'll be characterising the various parameters as I progress through my design so will compile a doc and post it somewhere for future reference. I will look through the raw data to correlate with my results.
2
btw, what is the naming convention used for the various vth values given? For example, for the 1v8 NMOS they are specified as: VTXNL, VTXNN42, VTXNS15 and VTSNSN15.
oh ignore, I see it corresponds to the L of the device characterised
... or in some cases the W!