Add description of centroid file conventions from screaming circuits

diff --git a/datasheets/ti/opa356.pdf b/datasheets/ti/opa356.pdf
new file mode 100644 (file)
index 0000000..e2de449
Binary files /dev/null and b/datasheets/ti/opa356.pdf differ

diff --git a/docs/understanding-the-centroid-file-r2-1.pdf b/docs/understanding-the-centroid-file-r2-1.pdf
new file mode 100644 (file)
index 0000000..b774b5e
Binary files /dev/null and b/docs/understanding-the-centroid-file-r2-1.pdf differ