Characterization of the ATLAS Liquid Argon Front-End ASIC ALFE2 for the HL-LHC upgrade

In this study, ALFE2 is an ATLAS Liquid Argon Calorimeter (LAr) Front-End ASIC designed for the HL-LHC upgrade. ALFE2 comprises four channels of pre-amplifiers and CR-(RC)² shapers with adjustable input impedance. ALFE2 features two separate gain outputs to provide 16-bit dynamic-range coverage and an optimum resolution. ALFE2 is characterized using a Front-End Test Board (FETB) based on a Zynq UltraScale+ MPSoC and two octal-channel 16-bit high-speed ADCs. The test results indicate that ALFE2 fulfills or greatly exceeds all specifications on gain, noise, linearity, uniformity, and radiation tolerance.. Authors: Matakias, Dimitrios [Brookhaven National Laboratory (BNL), Upton, NY (United States)]; Carini, G. [Brookhaven National Laboratory (BNL), Upton, NY (United States)]; Chen, H. [Brookhaven National Laboratory (BNL), Upton, NY (United States)]; Dabrowski, M. [Brookhaven National Laboratory (BNL), Upton, NY (United States); Katholieke Univ. Leuven (Belgium)]; Deptuch, G. [Brookhaven National Laboratory (BNL), Upton, NY (United States)]. DOE Contract: SC0012704. Subjects: 47 OTHER INSTRUMENTATION; Analogue electronic circuits; Front-end electronics for detector readout; Radiation hard electronics