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The design, manufacture and characterization of the SWIR channel detector for the Proba-V mission

机译：Proba-V任务的SWIR通道检测器的设计，制造和表征

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Proba-V is a Belgian mini-satellite, designed to bridge the gap between the present Spot-Vegetation Mission and the future GMES Sentinel missions. In order to continue the information gathering the earth surface shall be scanned in 3 Vis/NIR bands and 1 SWIR band. In this paper we will mainly focus on the development of the SWIR band FPA, whereas other contributors will discuss more in detail the mission and the overall optical concept.rnThe SWIR FPA is a long linear array of 68 mm, as long as the visual detector array; due to the fact that the SWIR FPA is a hybrid one with a detector array and a silicon readout circuit, the resolution of the SWIR array is halved wrt the visible array. InGaAs, grown lattice matched on an InP substrate and operated at room temperature, is selected as the baseline detector material.rnDue to the length of the linear array w.r.t. the InGaAs wafer size; it was decided to compose the overall FPA of several subparts. During the architecture study, it was decided to aim for a mechanically butted array with 3 staggered sensors lines, which are separated by 1.5 mm. App 140 pixels are foreseen in the overlap in order to realign the ground information.rnThe pixel alignment over the full array can be maintained within the following error margins: in plane (X- and Y-orientation): ≤ 25 μm and out of plane (Z-direction): ≤ 100 μm.rnThe detectors are wire bonded to the Silicon readout circuit. The detector interface is a CTIA with selectable gain or sensitivity. The nominal Feedback capacitor is 600 fF, resulting in a sensitivity of 270 nV/e-. The analog signal path is further equipped with a CDS stage and a S&H bank.rnThe power dissipation of the array in slow scan mode is below 300 mW per module or < 900 mW for the FPA. The noise of the array is measured to be below 1 mVrms on a signal swing of 2 Vptp , resulting in a circuit dynamic range of >2000:l..
机译：Proba-V是比利时的微型卫星，旨在弥合当前的“点植被”任务与未来的GMES Sentinel任务之间的差距。为了继续收集信息，必须在3个Vis / NIR波段和1个SWIR波段中扫描地面。本文将主要关注SWIR波段FPA的发展，而其他撰稿人将更详细地讨论任务和整体光学概念.rn SWIR FPA是68 mm长的线性阵列，只要是视觉探测器即可数组由于SWIR FPA是带有检测器阵列和硅读出电路的混合传感器，因此SWIR阵列的分辨率与可见阵列相比降低了一半。 InGaAs是在InP衬底上匹配并在室温下工作的生长晶格，被选作基线检测器材料。由于线性阵列的长度w.r.t。 InGaAs晶片尺寸；决定组成几个子部分的总体FPA。在体系结构研究期间，决定将目标对准具有3条交错的传感器线（间隔1.5毫米）的机械对接阵列。可以预见App App会有140个像素重叠，以便重新对齐地面信息。rn可以将整个阵列上的像素对齐保持在以下误差范围内：面内（X和Y方向）：≤25μm，面外（Z方向）：≤100μm.rn检测器通过引线键合至硅读出电路。检测器接口是具有可选增益或灵敏度的CTIA。标称反馈电容器为600 fF，因此灵敏度为270 nV / e-。模拟信号路径还配备了CDS级和S＆H bank。在慢速扫描模式下，每个模块的阵列功耗低于300 mW，对于FPA则小于900 mW。在2 Vptp的信号摆幅下，测得的阵列噪声低于1 mVrms，从而导致电路动态范围> 2000：1。

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