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Proceedings Paper

A low-noise, extended dynamic range 1.3 megapixel InGaAs array
Author(s): Wim Vereecken; Urbain Van Bogget; Thierry Colin; Rosa-Maria Vinella; Jo Das; Patrick Merken; Jan Vermeiren
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Paper Abstract

Xenics has designed and manufactured a 1280*1024 pixel, 17 µm pitch InGaAs array for SWIR imaging in the [0.9 - 1.7 µm] range. It will report on the first characterization results of the device. As usual for this type of room temperature operated SWIR image sensors, the detector interface is based on a CTIA stage, yielding excellent linearity, a low detector bias and hence a low and stable dark current combined with low image lag. The charge to voltage conversion factor is 40 µV/e-. The pixel interface scheme contains a CDS circuit in order to reduce the kTC noise and common mode effects. The noise is expected to be below 30 e-rms in linear mode, resulting in a dynamic range < 60 dB. Additionally the linear dynamic range is complemented with a high dynamic range logarithmic response with a saturation level < 5 nA/pixel. The information in the pixel matrix can be read via 2, 4 or 8 outputs, yielding a maximum full frame rate between 50 and 200 Hz. Each output is operating at 40 MHz pixel rate. The outputs are differential with a common mode voltage of 0.9 V and an adjustable output swing of 2 Vptp. Nevertheless the power dissipation shall be below 330 mW.

Paper Details

Date Published: 11 June 2013
PDF: 8 pages
Proc. SPIE 8704, Infrared Technology and Applications XXXIX, 870404 (11 June 2013); doi: 10.1117/12.2019030
Show Author Affiliations
Wim Vereecken, Xenics NV (Belgium)
Urbain Van Bogget, Xenics NV (Belgium)
Thierry Colin, Xenics NV (Belgium)
Rosa-Maria Vinella, Xenics NV (Belgium)
Jo Das, Xenics NV (Belgium)
Patrick Merken, Xenics NV (Belgium)
Royal Military Academy (Belgium)
Jan Vermeiren, Xenics NV (Belgium)


Published in SPIE Proceedings Vol. 8704:
Infrared Technology and Applications XXXIX
Bjørn F. Andresen; Gabor F. Fulop; Charles M. Hanson; Paul R. Norton; Patrick Robert, Editor(s)

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