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Proceedings Paper

A 400 KHz line rate 2048-pixel stitched SWIR linear array
Author(s): Ankur Anchlia; Rosa Maria Vinella; Daphne Gielen; Kristof Wouters; Vincent Vervenne; Peter Hooylaerts; Pieter Deroo; Wouter Ruythooren; Danny De Gaspari; Jo Das; Patrick Merken
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Paper Abstract

Xenics has developed a family of stitched SWIR long linear arrays that operate up to 400 KHz of line rate. These arrays serve medical and industrial applications that require high line rates as well as space applications that require long linear arrays. The arrays are based on a modular ROIC design concept: modules of 512 pixels are stitched during fabrication to achieve 512, 1024 and 2048 pixel arrays. Each 512-pixel module has its own on-chip digital sequencer, analog readout chain and 4 output buffers. This modular concept enables a long array to run at a high line rates irrespective of the array length, which limits the line rate in a traditional linear array. The ROIC is flip-chipped with InGaAs detector arrays. The FPA has a pixel pitch of 12.5μm and has two pixel flavors: square (12.5μm) and rectangular (250μm). The frontend circuit is based on Capacitive Trans-impedance Amplifier (CTIA) to attain stable detector bias, and good linearity and signal integrity, especially at high speeds. The CTIA has an input auto-zero mechanism that allows to have low detector bias (<20mV). An on-chip Correlated Double Sample (CDS) facilitates removal of CTIA KTC and 1/f noise, and other offsets, achieving low noise performance. There are five gain modes in the FPA giving the full well range from 85Ke- to 40Me-. The measured input referred noise is 35e-rms in the highest gain mode. The FPA operates in Integrate While Read mode and, at a master clock rate of 60MHz and a minimum integration time of 1.4μs, achieves the highest line rate of 400 KHz. In this paper, design details and measurements results are presented in order to demonstrate the array performance.

Paper Details

Date Published: 20 May 2016
PDF: 8 pages
Proc. SPIE 9819, Infrared Technology and Applications XLII, 981907 (20 May 2016); doi: 10.1117/12.2223696
Show Author Affiliations
Ankur Anchlia, Xenics NV (Belgium)
Rosa Maria Vinella, Xenics NV (Belgium)
Daphne Gielen, Xenics NV (Belgium)
Kristof Wouters, Xenics NV (Belgium)
Vincent Vervenne, Xenics NV (Belgium)
Peter Hooylaerts, Xenics NV (Belgium)
Pieter Deroo, Xenics NV (Belgium)
Wouter Ruythooren, Xenics NV (Belgium)
Danny De Gaspari, Xenics NV (Belgium)
Jo Das, Xenics NV (Belgium)
Patrick Merken, Xenics NV (Belgium)
Royal Military Academy (Belgium)

Published in SPIE Proceedings Vol. 9819:
Infrared Technology and Applications XLII
Bjørn F. Andresen; Gabor F. Fulop; Charles M. Hanson; Paul R. Norton, Editor(s)

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