A 256 x 256 SPAD array with in-pixel Time to Amplitude Conversion for Fluorescence Lifetime Imaging Microscopy

Parmesan Luca, Neale Dutton, Nikola Krstajic, N. Calder, A. Holmes, Lindsay A. Grant, Robert Henderson

Research output: Contribution to conferencePaperpeer-review

Abstract

A high resolution Time Correlated Single Photon
Counting (TCSPC) image sensor based on sample and
hold Time to Amplitude Converter (TAC)pixels and a global
ramp voltage is presented. The 256 256 array achieves an
8 μm Pixel Pitch (PP), 19:63% Fill Factor (FF), output voltage
range (0:7V) and time jitter of 368 ps at 10 fps employing
an off-chip 14-bit differential Analogue to Digital Converter
(ADC). A column-parallel flash ADCis also implemented,
allowing coarse 3-bin TCSPC histogramming at 4 kfps for
video rate fluorescence lifetime imaging.
Original languageEnglish
Number of pages4
Publication statusPublished - Jun 2015
EventInternational Image Sensor Workshop - Vaals, Netherlands
Duration: 8 Jun 201511 Jun 2015

Conference

ConferenceInternational Image Sensor Workshop
CountryNetherlands
CityVaals
Period8/06/1511/06/15

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