SAMPA Chip: The New 32 Channels ASIC for the ALICE TPC and MCH Upgrades

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This paper presents the test results of the second prototype of SAMPA, the ASIC designed for the upgrade of read-out front end electronics of the ALICE Time Projection Chamber (TPC) and Muon Chamber (MCH). SAMPA is made in a 130 nm CMOS technology with 1.25 V nominal voltage supply and provides 32 channels, with selectable input polarity, and three possible combinations of shaping time and sensitivity. Each channel consists of a Charge Sensitive Amplifier, a semi-Gaussian shaper and a 10-bit ADC; a Digital Signal Processor provides digital filtering and compression capability. In the second prototype run both full chip and single test blocks were fabricated, allowing block characterization and full system behaviour studies. Experimental results are here presented showing agreement with requirements for both the blocks and the full chip.


  • A. Ayala Pabon
  • M. Bregant
  • C Britton
  • G. Brulin
  • Rogerio de Carvalho
  • V. Chambert
  • D. D. Chinellato
  • B. Espagnon
  • H. D.Hernandez Herrera
  • T. Ljubicic
  • S. M. Mahmood
  • U. Mjörnmark
  • D Moraes
  • M. G. Munhoz
  • G. Noël
  • L. Osterman
  • A. Pilyar
  • K. Read
  • A. Ruette
  • Paul Russo
  • B. C.S. Sanches
  • L. Severo
  • C Suire
  • G. J. Tambave
  • K. M.M. Tun-Lanoë
  • W. Van Noije
  • A. Velure
  • S. Vereschagin
  • E. Wanlin
  • T. O. Weber
  • S. Zaporozhets
External organisations
  • University of São Paulo
  • Oak Ridge National Laboratory
  • Institut de Physique Nucléaire Orsay (IPN) Orsay
  • University of Campinas
  • Brookhaven National Laboratory
  • University of Oslo
  • University of Bergen
  • University of Paris-Sud
  • Technological Institute of Aeronautics
  • Joint Institute for Nuclear Research, Dubna
  • Federal University of Santa Catarina
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Accelerator Physics and Instrumentation


  • Analogue electronic circuits, CMOS readout of gaseous detectors, Front-end electronics for detector readout
Original languageEnglish
Article numberC04008
JournalJournal of Instrumentation
Issue number4
Publication statusPublished - 2017 Apr 5
Publication categoryResearch