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Proceedings Paper

A 400 KHz line rate 2048 pixel modular SWIR linear array for earth observation applications
Author(s): Ankur Anchlia; Rosa Maria Vinella; Kristof Wouters; Daphne Gielen; Peter Hooylaerts; Pieter Deroo; Wouter Ruythooren; Koen van der Zanden; Jan Vermeiren; Patrick Merken
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Paper Abstract

In this paper, we report about a family of linear imaging FPAs sensitive in the [0.9 - 1.7um] band, developed for high speed applications such as LIDAR, wavelength references and OCT analyzers and also for earth observation applications. Fast linear FPAs can also be used in a wide variety of terrestrial applications, including high speed sorting, electro- and photo-luminesce and medical applications. 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. In principle, this concept can be extended to any multiple of 512 pixels, the limiting factor being the pixel yield of long InGaAs arrays and the CTE differences in the hybrid setup. Each 512-pixel module has its own on-chip digital sequencer, analog readout chain and 4 output buffers. This modular concept enables a long-linear array to run at a high line rate of 400 KHz irrespective of the array length, which limits the line rate in a traditional linear array. The pixel has a pitch of 12.5um. The detector frontend is based on CTIA (Capacitor Trans-impedance Amplifier), having 5 selectable integration capacitors giving full well from 62x103e- (gain0) to 40x106e- (gain4). An auto-zero circuit limits the detector bias non-uniformity to 5-10mV across broad intensity levels, limiting the input referred dark signal noise to 20e-rms for Tint=3ms at room temperature. An on-chip CDS that follows the CTIA facilitates removal of Reset/KTC noise, CTIA offsets and most of the 1/f noise. The measured noise of the ROIC is 35e-rms in gain0. At a master clock rate of 60MHz and a minimum integration time of 1.4us, the FPAs reach the highest line rate of 400 KHz.

Paper Details

Date Published: 12 October 2015
PDF: 7 pages
Proc. SPIE 9639, Sensors, Systems, and Next-Generation Satellites XIX, 96390T (12 October 2015); doi: 10.1117/12.2194935
Show Author Affiliations
Ankur Anchlia, Xenics NV (Belgium)
Rosa Maria Vinella, Xenics NV (Belgium)
Kristof Wouters, Xenics NV (Belgium)
Daphne Gielen, Xenics NV (Belgium)
Peter Hooylaerts, Xenics NV (Belgium)
Pieter Deroo, Xenixs NV (Belgium)
Wouter Ruythooren, Xenics NV (Belgium)
Koen van der Zanden, Xenics NV (Belgium)
Jan Vermeiren, Xenics NV (Belgium)
Patrick Merken, Xenics NV (Belgium)
Royal Military Academy (Belgium)


Published in SPIE Proceedings Vol. 9639:
Sensors, Systems, and Next-Generation Satellites XIX
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

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