This work is focused on the design summary and experimental characterization of the ORION ASIC, a multi-die integrated circuit for X and gamma ray detection designed for the THESEUS mission related imaging and XGIS instrument. An overview of the complete electronic read-out acquisition channel including its design peculiarities is thus given. ORION front-end system is made up by a very low noise analog front-end pre-amplifier circuit on a dedicated die and a full custom, versatile, mixed signal back-end chip on a second die. The back-end includes the rest of the analog chain, 3 dedicated hysteresis-less ADCs and a suitable logic for event type extraction and time-stamp assignment. In the experimental results the correct extraction of different event types (X, gamma) has been verified to be processed correctly by the system, as well as time-stamp assignment. Also the analog chain and A/D conversion target required linearity in the dynamic range of interest have been met. Configuration of the ASIC can be performed by loading a serial register, while output data is delivered in parallel form for fast read-out in the single channel version. An additional custom SPI I/O is available in the imminent multi-channel version.

Experimental Characterization of the ORION ASIC: The Read-Out Circuit for X-gamma-Ray Detection of the THESEUS Mission Spectrometer

Mele, F;Dedolli, I;Gandola, M;Bertuccio, G;
2022-01-01

Abstract

This work is focused on the design summary and experimental characterization of the ORION ASIC, a multi-die integrated circuit for X and gamma ray detection designed for the THESEUS mission related imaging and XGIS instrument. An overview of the complete electronic read-out acquisition channel including its design peculiarities is thus given. ORION front-end system is made up by a very low noise analog front-end pre-amplifier circuit on a dedicated die and a full custom, versatile, mixed signal back-end chip on a second die. The back-end includes the rest of the analog chain, 3 dedicated hysteresis-less ADCs and a suitable logic for event type extraction and time-stamp assignment. In the experimental results the correct extraction of different event types (X, gamma) has been verified to be processed correctly by the system, as well as time-stamp assignment. Also the analog chain and A/D conversion target required linearity in the dynamic range of interest have been met. Configuration of the ASIC can be performed by loading a serial register, while output data is delivered in parallel form for fast read-out in the single channel version. An additional custom SPI I/O is available in the imminent multi-channel version.
2022
2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)
978-1-6654-8360-5
THESEUS Mission
ORION ASIC
SDD
X and gamma Rays
Mixed Signal
Digital Output
SPI
Event Type Detection
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1231887
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