Threshold equalization algorithm for the XAA1.2 ASICs and its application to SuperAGILE X-ray imager

Luigi Pacciani, Olga Uberti, Ettore Del Monte, Andrea Argan, Marco Feroci, Paolo Soffitta, Alessio Trois, Enrico Costa, Immacolata Donnarumma, Yuri Evangelista, Francesco Lazzarotto, Massimo Rapisarda, Ennio Morelli, Marcello Mastropietro, Alda Rubini

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Abstract

In this paper we report the procedure developed and the results achieved for the equalization of threshold levels for the 6144 discriminator units of XAA1.2 ASICs chosen for the SuperAGILE X-ray imager onboard the AGILE satellite. For these kinds of imager, we will show that the threshold equalization is a critical issue. For each XAA1.2 we reduced the threshold dispersion by a factor of 3-4, and a factor of ∼ 2 for daisy chains of ASICs. Despite the method being developed for XAA1.2, the discriminator units and threshold fine-adjustment circuits are common to other chips of XA and VA-TA family, so that the algorithm and results can be extended to these two families of ASICs. This work may be useful for the design of electronic boards where the threshold equalization is a crucial issue. © 2008 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)367 - 375
Number of pages9
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume593
Issue number3
DOIs
Publication statusPublished - 11 Aug 2008
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

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