期刊
JOURNAL OF INSTRUMENTATION
卷 17, 期 3, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1748-0221/17/03/C03015
关键词
Front-end electronics for detector readout; Radiation-hard electronics
This article presents the experimental results on the latest and final version of the CMS High Granularity Calorimeter (CE), HGCROC3. It includes low-noise/high-gain preamplifiers/shapers and a 10-bit 40 MHz successive approximation ADC for charge measurement. The chip also embeds discriminators, time-to-digital converters, and other ancillary services.
For the CMS High Granularity Calorimeter (CE), the final version of the 72 channel front-end ASIC (HGCROC3) was submitted in December 2020. HGCROC3 includes low-noise/high-gain preamplifiers/shapers and a 10-bit 40 MHz successive approximation ADC (SAR-ADC) that provide the charge measurement over the linear range of the preamplifier. In the saturation range, a discriminator and a time-to-digital converter (TDC) provide the charge information from the time over threshold (ToT; 200 ns dynamic range, 50 ps binning). A fast discriminator and another TDC provide timing information to 25 ps accuracy. The chip embeds all necessary ancillary services: bandgap circuit, PLL, threshold DACs. We present the experimental results on the latest and final version (HGCROC3) received in April 2021.
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