Add dev OPA397DBV, LMP7721MA, OPA378AIDBV, LMH6552MA

[eto-]

SUMMARY

Added TI devices with no dependencies:

• OPA397DBV
• LMP7721MA
• OPA378AIDBV
• LMH6552MA

DATASHEETS / REFERENCES

https://www.ti.com/lit/ds/symlink/opa397.pdf
https://www.ti.com/lit/ds/symlink/opa378.pdf
https://www.ti.com/lit/ds/symlink/opa2378.pdf
https://www.ti.com/lit/gpn/LMP7721

OPEN QUESTIONS / UNRESOLVED ISSUES

CHECKLIST

• [x ] I have read and followed the library conventions¹.
• For packages, I followed IPC7351C (see details in library conventions).
• For modified elements, I bumped their version number².
• [x ] I already used the new library elements in a design and verified their correctness (optional).
• [x ] I'm the copyright owner of the added content (i.e. the changes are made by myself, not copied/imported from somewhere else).
• [x ] I agree to publish all my changes under the CC0 Public Domain License³, allowing everyone to use and modify the content without any restrictions.

¹ Library Conventions: https://docs.librepcb.org/#libraryconventions
² Minor version bump if only metadata was modified (e.g. "0.1" -> "0.1.1"), major version bump if functional changes were made (e.g. "0.1" -> "0.2")
³ CC0 Public Domain License: https://en.wikipedia.org/wiki/CC0

[ubruhin]

I fixed one datasheet URL. Otherwise it looks good, thanks!