MUSIC: An 8 channel readout ASIC for SiPM arrays
MUSIC: An 8 channel readout ASIC for SiPM arrays
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音乐：用于 SiPM 阵列的 8 通道读出 ASIC
DOI：
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发表时间：
2016
期刊：
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通讯作者：
D. Sánchez
中科院分区：
文献类型：
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作者：
S. Gómez;D. Gascón;G. Fernandez;A. Sanuy;J. Mauricio;R. Graciani;D. Sánchez
本文介绍了一种基于新型低输入阻抗电流传输器的8通道SiPM阳极读出专用集成电路。这种多用途SiPM集成电路（MUSIC）被设计用于多种目的，包括例如，一些切伦科夫望远镜阵列（CTA）相机的SiPM阵列的读出。在电路的最前端部分的电流分配方案将输入电流分成不同比例的副本，这些副本连接到独立的电流镜。该电路包含一个可调极点零消除的SiPM恢复时间常数，以处理来自不同制造商的传感器。该器件支持高达100 ns的衰减时间，覆盖市场上大多数可用的SiPM器件。MUSIC运算器有三个主要特点：（1）单个输入通道总和的差分输出;（2）8个单个单端模拟输出;（3）8个单个二进制输出。数字输出使用时间超过阈值技术对数字信号持续时间内收集的电荷量进行编码。对于每个单独的通道，用户必须选择模拟或数字输出。每个功能，信号总和和8个A/D输出，包括一个可选的双增益配置。此外，信号和实现双增益输出，提供15位动态范围。采用AMS 0.35 µm SiGe技术设计的MUSIC的全芯片仿真结果如下：芯片总尺寸为9 mm 2，通道总和带宽为500 MHz，A/D通道带宽为150 MHz，低输入阻抗（？32 Ω），单光子输出脉冲半高宽（FWHM）在5和10 ns之间，功率消耗为1.30 mW/ch +1.200 mW（8 ch总和）。MUSIC的封装原型样品预计将于2016年3月完成。
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.