MUSIC: An 8 channel readout ASIC for SiPM arrays

Sergio Gómez; David Gascón; Gerard Fernández; Andreu Sanuy; Joan Mauricio; Ricardo Graciani; David Sanchez

doi:10.1117/12.2231095

29 April 2016 MUSIC: An 8 channel readout ASIC for SiPM arrays

Sergio Gómez , David Gascón, Gerard Fernández, Andreu Sanuy, Joan Mauricio, Ricardo Graciani, David Sanchez

Proceedings Volume 9899, Optical Sensing and Detection IV; 98990G (2016) https://doi.org/10.1117/12.2231095
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

This paper presents an 8 channel ASIC for SiPM anode readout based on a novel low input impedance current conveyor (under patent¹). This Multiple Use SiPM Integrated Circuit (MUSIC) has been designed to serve several purposes, including, for instance, the readout of SiPM arrays for some of the Cherenkov Telescope Array (CTA) cameras. The current division scheme at the very front end part of the circuit splits the input current into diﬀerently scaled copies which are connected to independent current mirrors. The circuit contains a tunable pole zero cancellation of the SiPM recovery time constant to deal with sensors from diﬀerent manufacturers. Decay times up to 100 ns are supported covering most of the available SiPM devices in the market. MUSIC oﬀers three main features: (1) diﬀerential output of the sum of the individual input channels; (2) 8 individual single ended analog outputs and; (3) 8 individual binary outputs. The digital outputs encode the amount of collected charge in the duration of the digital signal using a time over threshold technique. For each individual channel, the user must select the analog or digital output. Each functionality, the signal sum and the 8 A/D outputs, include a selectable dual-gain conﬁguration. Moreover, the signal sum implements dual-gain output providing a 15 bit dynamic range. Full die simulation results of the MUSIC designed using AMS 0.35 µm SiGe technology are presented: total die size of 9 mm², 500 MHz bandwidth for channel sum and 150 MHz bandwidth for A/D channels, low input impedance (≈32 Ω), single photon output pulse width at half maximum (FWHM) between 5 and 10 ns and with a power consumption of ≈ 30 mW/ch plus ≈ 200 mW for the 8 ch sum. Encapsulated prototype samples of the MUSIC are expected by March 2016.

Citation Download Citation

Sergio Gómez , David Gascón, Gerard Fernández, Andreu Sanuy, Joan Mauricio, Ricardo Graciani, and David Sanchez "MUSIC: An 8 channel readout ASIC for SiPM arrays", Proc. SPIE 9899, Optical Sensing and Detection IV, 98990G (29 April 2016); https://doi.org/10.1117/12.2231095

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