Fuse trim links physical analysis methodology

Fuse trim links failure on analog devices can cause wrong Vref value, incorrect I2C address, incorrect frequency setting, etc. The fuse trim links failure can either be unblown or mistakenly blown during the trimming process. To validate, if blown or unblown, physical analysis is needed to check the trim links. This paper aims to discuss the different physical analysis methodology to check the integrity of trim links.