Multipurpose, Fully-Integrated 128×128 Event-Driven MD-SiPM with 512 16-Bit TDCs with 45 PS LSB and 20 ns Gating

A. Carimatto, A. Ulku, S. Lindner, E.D. D'Aillon, B. Rae, S. Pellegrini, E. Charbon

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    1 Citation (Scopus)


    A multipurpose monolithic array of 2×2 multi-channel digital silicon photomultipliers (MD-SiPMs) fabricated in 40nm CMOS technology is presented. Each MD-SiPM comprises 64×64 smart pixels connected to 128 low-power 45ps sliding-scale time-to-digital converters (TDCs). The MD-SiPMs are designed to indirectly capture gamma events in positron emission tomography (PET). The sensor can operate in frame-based and event-driven mode; the latter best suited to capture gamma events. The digital read-out is fully embedded in the sensor and it is reconfigurable by way of serial communication. Data packets are sent following a simple protocol compatible with an external FIFO, therefore eliminating the need of an FPGA. A dedicated input can be used to operate synchronously with an event generator, such as a pulsed laser, useful in other applications, like LiDAR. The system is inherently compatible with 3D-stacking technology; thus serving as a front end for different SPAD technologies, suitable for a variety of applications.

    Original languageEnglish
    Title of host publication2018 Symposium on VLSI Circuits Digest of Technical Papers
    Place of PublicationPiscataway, NJ
    Number of pages2
    ISBN (Electronic)978-1-5386-4214-6
    Publication statusPublished - 2018
    Event2018 Symposia on VLSI Technology and Circuits: 2018 VLSI Technology Symposium - 2018 VLSI Circuits - Hilton Hawaiian Village, Honolulu, United States
    Duration: 18 Jun 201822 Jun 2018


    Conference2018 Symposia on VLSI Technology and Circuits
    CountryUnited States


    • Voltage-controlled oscillators
    • Three-dimensional displays
    • Vents
    • Registers
    • Energy resolution
    • Positron emission tomography
    • Field programmable gate arrays


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