The signal digitization for CROSS, a bolometric experiment for the search of neutrinoless double beta decay at LSC—Canfranc Underground Laboratory, will be based on a custom solution comprised of an analog-to-digital board interfaced to an Altera Cyclone V FPGA module. Each analog-to-digital board hosts 12 channels that allow data digitization up to 25 ksps per channel and an effective resolution of 21 bits at the typical sample rate required by the experiment (5 ksps). The board also allows to digitally select the cutoff frequency of the anti-aliasing filter with 10 bit resolution from 24 Hz up to 2.5 kHz, as required by fast scintillating bolometers. The FPGA is responsible for the synchronization of the analog-to-digital boards and for the data transfer to the storage, using UDP protocol on a standard Ethernet interface. Each FPGA can manage the data coming from eight boards (96 channels), allowing an excellent scalability. In this contribution, we will present a complete overview of the system and a detailed characterization of the system performance.

中文翻译：

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CROSS 实验的高分辨率数字化系统

CROSS 的信号数字化是 LSC-Canfranc 地下实验室搜索中微子双 β 衰变的辐射热实验，其信号数字化将基于定制解决方案，该解决方案由连接到 Altera Cyclone V FPGA 模块的模数板组成。每个模数板都有 12 个通道，每个通道的数据数字化速度高达 25 ksps，在实验所需的典型采样率 (5 ksps) 下，有效分辨率为 21 位。该板还允许根据快速闪烁辐射热计的要求，以数字方式选择具有 10 位分辨率的抗混叠滤波器的截止频率，从 24 Hz 到 2.5 kHz。FPGA 负责使用标准以太网接口上的 UDP 协议来同步模数板和将数据传输到存储器。每个 FPGA 可以管理来自 8 个板卡（96 个通道）的数据，具有出色的可扩展性。在这篇文章中，我们将提供系统的完整概述和系统性能的详细表征。