CERN Accelerating science

Article
Title Wafer test of the LHCb Outer Tracker TDC-Chip
Author(s) Knopf, Jan ; Muckerheide, R ; Stange, U ; Trunk, U ; Uwer, U ; Wiedner, D
Affiliation (Physikalisches Institut der Universität Heidelberg, Heidelberg, Germany)
Publication CERN, 2007
Number of pages 4
In: Proceedings of the Twelfth Workshop on Electronics for LHC and Future Experiments, pp.475-478
DOI 10.5170/CERN-2007-001.475
Subject category Detectors and Experimental Techniques
Accelerator/Facility, Experiment CERN LHC ; LHCb
Abstract The OTIS-TDC is the front end readout chip for the LHCb Outer Tracker. It is designed to measure drift times with a resolution better than 1 ns. As the chip will be directly mounted to its board, the test have to be performed on the wafer itself. As the testing period for 7 000 chips was only three weeks, many test routines have been implemented on a FPGA. Each chip is subjected to detailed probe testing to ensure the full functionality as well as a good performance. Overall 47 wafer have been tested. From the chips passing the test 2 000 have been used in the Outer Tracker front end electronic.



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