Speaker
Description
The CRYO ASIC is a system-on-chip (SoC) waveform digitizer and serializer developed for cryogenic particle physics experiments. It integrates both analog and digital functionalities into a single chip, including signal pre-amplification, waveform digitization, channel multiplexing, and high-speed data serialization. The ASIC is specifically designed to enable high-density detector readout while maintaining low power consumption, low electronic noise, and low intrinsic radioactivity for next-generation rare-event and low-background experiments. One CRYO ASIC variant incorporates a preamplifier optimized for an input capacitance of approximately 150 pF, allowing efficient readout of large-capacitance silicon photomultipliers (SiPMs). This is achieved through weak capacitive coupling between the SiPM and a charge-sensitive preamplifier, enabling stable operation with good signal fidelity in cryogenic environments. In this poster, we report recent characterization results from SiPM readout measurements, including noise performance, signal response, and overall readout stability under cryogenic operating conditions.