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Description
This work describes the development of the Multi-channel Integrated Zone-sampling Analogue-memory based Readout (MIZAR) ASIC. This 64-channel chip was designed as part of NASA's POEMMA Balloon with RADIO (PBR) mission, which aims to detect Ultra-High Energy Cosmic Rays (UHECRs) and showers produced by the interaction of Cosmic Neutrinos (CNs) in the crust. The ASIC was implemented to read out a tile of 8x8 Silicon Photo-Multipliers (SiPMs) used to acquire the optical Cherenkov signals generated by Extensive Air Showers (EASs). A channel is partitioned into 256 cells where each one integrates an analogue memory, a Wilkinson Analog-to-Digital Converter (ADC) and a digital memory operating at the nominal sampling rate of 200 MS/s (5 ns integration time). The signal is digitized on-chip, then the converted data is read out by an FPGA. MIZAR also provides a 64-bit hitmap as first-level trigger which can be elaborated by an external firmware. This ASIC can also be configured to further segment the channels into units of 32 or 64 cells each and the ADC resolution can be set in a range between 8 and 12 bits. The chip was designed in a commercial 65 nm CMOS technological node and it was submitted for production in December 2024. The ASICs are expected to be delivered in March 2025, with chip characterization planned for the following months.
| Eligibility for "Best presentation for young researcher" or "Best poster for young researcher" prize | No |
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