I found a suggested footprint for package CP-8-8 (very close to the CP-8-10) but there's no footprint PDF for the CP-8-10 (used on ADP198).
My thougth was to modify the CP-8-8 footprint, making the pads 0.1mm longer (using 0.30 x 0.45 instead of 0.30 x 0.35) keeping the toes of the pads where they are (so the extra length is on the inside). Measuring toe-to-toe on pads, I currently have 2.36mm. The powerpad is the same size on both, so I'd use the 1.1x1.6 pad (from CP-10-10 footprint).
If there is a footprint for CP8-8, could you please email to me or post it?
Similar part’s footprint (CP-8-8) and outline:
http://www.analog.com/static/imported-files/footprints/LFCSP%20(CP)/CP-8-8.PDF
http://www.analog.com/static/imported-files/packages/PKG_PDF/LFCSP(CP)/CP_8_8.pdf
ADP198 outline (they don’t show a footprint for CP-8-10):
http://www.analog.com/static/imported-files/packages/PKG_PDF/LFCSP(CP)/CP_8_10.pdf
index to their LFCSP footprints and outlines:
http://www.analog.com/en/technical-library/packages/csp-chip-scale-package/lfcsp/index.html
Thanks,
Chris