A 32x32-Pixel Array with In-Pixel Photon Counting and Arrival Time Measurement in the Analog Domain

D. Stoppa, F. Borghetti, R. Walker, L. Grant, Robert Henderson, M. Gersbach, E. Charbon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

A Time-to-Amplitude Converter (TAC) with embedded analog-to-digital conversion is implemented in a 130-nm CMOS imaging technology. The proposed module is conceived for Single-Photon Avalanche Diode imagers and can operate both as a TAC or as an analog counter, thus allowing both time-correlated or time-uncorrelated imaging operation. A single-ramp, 8-bit ADC with two memory banks to allow high-speed, time-interleaved operation is also included within each module. A 32times32-TACs array has been fabricated with a 50-mum pitch in order prove the highly parallel operation and to test uniformity and power consumption issues. The measured time resolution (LSB) is of 160 ps on a 20-ns time range with a uniformity across the array within plusmn2 LSBs, while DNL and INL are 0.7 LSB and 1.9 LSB respectively. The average power consumption is below 300 muW/pixel when running at 500 k measurements per second.
Original languageEnglish
Title of host publicationIEEE European Solid-State Circuits Conference (ESSCIRC)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages204 - 207
ISBN (Print)978-142444353-6
Publication statusPublished - 14 Sept 2009
EventIEEE European Solid-State Circuits Conference (ESSCIRC) - Athens, Greece
Duration: 14 Sept 200918 Sept 2009


ConferenceIEEE European Solid-State Circuits Conference (ESSCIRC)


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