CMB-S4 SiGe ASIC-based daughter board for low-temperature detectors front-end analog readout

L. H. Arnaldi; M. Gonzalez; D. Prêle; S. Chen; G. Deniel; M. Piat; J. P. Thermeau; S. Loucatos; F. Rarbi; J. Waquet

doi:10.1117/12.3020728

16 August 2024 CMB-S4 SiGe ASIC-based daughter board for low-temperature detectors front-end analog readout

L. H. Arnaldi, M. Gonzalez, D. Prêle, S. Chen, G. Deniel, M. Piat, J. P. Thermeau, S. Loucatos, F. Rarbi, J. Waquet

Proceedings Volume 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; 131022F (2024) https://doi.org/10.1117/12.3020728
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

CMB-S4 is the next generation, ground-based, cosmic microwave background (CMB) observatory. It is designed to explore the scientific potential contained in the CMB temperature and polarization anisotropies. The goal of CMB-S4 is to observe the mm sky with about 500,000 transition edge sensors (TES). These cryogenic detectors are read out using time division multiplexing (TDM). Two stages of superconducting quantum interference devices (SQUIDs) are used at cryogenic temperatures for multiplexing and amplifying the signals coming from the TESs. This imposes stringent noise requirements to the electronics for readout. In this paper, we discuss the developments and the first tests of an analog front-end differential electronics daughter board. The board is based on an SiGe application-specific integrated circuit (ASIC), the AwaXe v3, developed for the readout of ATHENA’s X-IFU instrument. It provides low-noise amplification (LNA) after the cryogenic multiplexer and supplies the low noise current biasing for the two SQUID stages and TESs. This front-end electronics is expected to improve the noise performances of the CMB-S4 readout chain and help moving towards a differential and compact design.

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L. H. Arnaldi, M. Gonzalez, D. Prêle, S. Chen, G. Deniel, M. Piat, J. P. Thermeau, S. Loucatos, F. Rarbi, and J. Waquet "CMB-S4 SiGe ASIC-based daughter board for low-temperature detectors front-end analog readout", Proc. SPIE 13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, 131022F (16 August 2024); https://doi.org/10.1117/12.3020728

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