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MAROC, a generic photomultiplier readout chip

S. Blin 1 P. Barrillon 2 C. de la Taille 2
1 Omega
LAL - Laboratoire de l'Accélérateur Linéaire
Abstract : The MAROC ASICs family is dedicated to the readout of 64-channel Multi Anode PMT and similar detectors. Its main roles are to correct the gain spread of MAPMT channels thanks to an individual variable gain preamplifier and to discriminate the input signals (from 50fC i.e 1/3 photo-electron) in order to produce 64 trigger outputs. A multiplexed analog charge output is also available with a dynamic range around 10 pe (~1.6 pC) and a 12 bit Wilkinson ADC is embedded. Three versions of this chip have been submitted. MAROC 2 is the production version for the ATLAS luminometer and MAROC3 is a version with lower dissipation and significant improvements concerning the charge (30 pe: ~5 pC) and trigger (discrimination from 10fC). This third version showed very good characteristics that are presented here.
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http://hal.in2p3.fr/in2p3-00537905
Contributor : Sabine Starita <>
Submitted on : Friday, November 19, 2010 - 4:16:06 PM
Last modification on : Wednesday, September 16, 2020 - 5:40:31 PM

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S. Blin, P. Barrillon, C. de la Taille. MAROC, a generic photomultiplier readout chip. 2010 Nuclear Science Symposium and Medical Imaging Conference, Nov 2010, Knoxville, United States. pp.1690-1693, ⟨10.1109/NSSMIC.2010.5874062⟩. ⟨in2p3-00537905⟩

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