May 24 – 28, 2021
America/Vancouver timezone

Performance of the "IRSX" multi-GSa/s, Switched Capacitor Array Waveform Sampling Frontend ASIC

May 25, 2021, 9:48 AM
Parallel session talk Readout: Front-end electronics Readout: Front-end electronics


Oskar Hartbrich (University of Hawaii at Manoa)


The "Ice Ray Sampler X" (IRSX) is a low-power 8-channel waveform sampling frontend ASIC designed for HEP applications, fabricated by TSMC in a 250nm CMOS process. Each input channel samples into a switched capacitor array (SCA) of 32,768 samples depth at an adjustable rate of 2-4GSa/s, for an effective sample buffer depth of 8-16μs. Stored samples can be digitised with 12bit resolution using the integrated Wilkinson ADC, without incurring any dead time on the sampling. The sample storage array is designed for random access for both sampling and digitisation, allowing for flexible acquisition schemes depending on the application.

The IRSX ASIC is currently being used in the 8192 channel front end electronics of the Belle II TOP detector. This talk will present performance figures and characterisation measurements of the IRSX ASIC obtained from test bench campaigns and during the operation in the installed TOP system.

TIPP2020 abstract resubmission? Yes, this would have been presented at TIPP2020.

Primary authors

Oskar Hartbrich (University of Hawaii at Manoa) Gary Varner (University of Hawaii) Dr Kurtis Nishimura (University of Hawaii at Manoa) Matt Andrew Luca Macchiarulo (Nalu scientific LLC)

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