IMMS Institut für Mikroelektronik- und Mechatronik-Systeme gemeinnützige GmbH (IMMS GmbH)’s Post

Tracking down the tiniest light: Benjamin Saft, Alexander Zimmer, Maximilian Wiener, Mirjam Skadell, and Eric Schäfer from IMMS and X-FAB will present Enhancing #Chemiluminescence #Detection with Dark-Count Rate Optimization Strategies for #SPADs in Conventional #CMOS #Technologies at the ISSW 2024 (The International #SPAD #Sensor Workshop & The SPAD Sensor School), June 3-6, 2024, Trento, Italy: https://lnkd.in/gRA9xZed They developed a #CMOS #singlephoton avalanche diode (SPAD)-based line #sensor for the low-light detection of #chemiluminescence in #pointofcare #invitro #diagnostic applications, where the lowest dark-count rate (DCR) is paramount. ➡ #sensor #chip architecture / features: - high-density linear SPAD sensor array (192 lines) - multiple SPADs and shared quenching circuits per line - hot pixel calibration to improve the signal-to-noise ratio (SNR) - line-by-line pulse counting - adjustable measurement intervals - on-chip SRAM for data storage - ALU with memory-efficient bfloat16 encoding - interfacing via I2C and QSPI ➡ #layoutdesign optimization of the SPADs: - to minimize DCR while - maintaining a high fill factor and - a high #photon detection probability (PDP) ➡ #measurement results: - optimal SNR for low light application achieved by selectively deactivating certain SPADs - SPAD deactivation up to 80%, depending on the DCR statistics of the sensor ➡ More detail: - on this #ASIC or on #asicdesign for #invitro #diagnostics: Eric Schäfer or www.imms.de/ivd  - on #SPAD #CMOS #technology: Alexander Zimmer ➡ Funding: This work has been carried out in the KODIAK project (www.imms.de/kodiak) which was funded as part of the European Union's response to the COVID-19 pandemic through the European Regional Development Fund (ERDF-OP 2014 – 2022) under the references 2021 FE 9127 and 2021 FE 9129.

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