LHC1: A semiconductor pixel detector readout chip with internal, tunable delay providing a binary pattern of selected events

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 383; no. 1; pp. 55 - 63
• Main Authors: Heijne, Erik H.M., Antinori, F., Barberis, D., Becks, K.H., Beker, H., Beusch, W., Burger, P., Campbell, M., Cantatore, E., Catanesi, M.G., Chesi, E., Darbo, G., D'Auria, S., DaVia, C., Di Bari, D., Di Liberto, S., Gys, T., Humpston, G., Jacholkowski, A., Jæger, J.J., Jakubek, J., Jarron, P., Klempt, W., Krummenacher, F., Knudson, K., Kubasta, J., Lassalle, J.C., Leitner, R., Lemeilleur, F., Lenti, V., Letheren, M., Lisowski, B., Lopez, L., Loukas, D., Luptak, M., Martinengo, P., Meddeler, G., Meddi, F., Middelkamp, P., Morando, M., Morettini, P., Munns, A., Musico, P., Pellegrini, F., Pengg, F., Pospisil, S., Quercigh, E., Ridky, J., Rossi, L., Safarik, K., Scharfetter, L., Segato, G., Simone, S., Smith, K., Snoeys, W., Sobczynski, C., Stastny, J., Vrba, V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.1996; Elsevier
• Subjects: Instrumentation and Detectors; Physics
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/S0168-9002(96)00658-4

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.