Author/Authors :
Heijne، نويسنده , , Erik H.M. and Antinori، نويسنده , , F. and Barberis، نويسنده , , D. and Becks، نويسنده , , K.H. and Beker، نويسنده , , H. and Beusch، نويسنده , , W. and Burger، نويسنده , , P. and Campbell، نويسنده , , M. and Cantatore، نويسنده , , E. and Catanesi، نويسنده , , M.G. and Chesi، نويسنده , , E. and Darbo، نويسنده , , G. and DʹAuria، نويسنده , , S. and DaVia، نويسنده , , C. and Di Bari، نويسنده , , D. and Di Liberto، نويسنده ,
Abstract :
The Omega3/LHC1 pixel detector readout chip comprises a matrix of 128 × 16 readout cells of 50 μm × 500 μm and peripheral functions with 4 distinct modes of initialization and operation, together more than 800 000 transistors. Each cell contains a complete chain of amplifier, discriminator with adjustable threshold and fast-OR output, a globally adjustable delay with local fine-tuning, coincidence logic and memory. Every cell can be individually addressed for electrical test and masking. First results have been obtained from electrical tests of a chip without detector as well as from source measurements. The electronic noise without detector is ∼ 100 e− rms. The lowest threshold setting is close to 2000 e− and non-uniformity has been measured to be better than 450 e− rms at 5000 e− threshold. A timewalk of < 10 ns and a precision of < 6 ns rms on a delay of 2 μs have been measured. The results may be improved by further optimization.
