3000 pixel linear InGaAs sensor for the Proba-V satellite

We report on the design and development of the large linear SWIR focal plane arrays to be deployed in the multispectral instrument of the Proba-V satellite. These sensors are based on mechanical butting of three InGaAs photodiode arrays with 1024 pixels on 25 μm pitch, forming a nearly continuous line of 3072 pixels. A new read-out integrated circuit (ROIC) for photocurrent integration and signal multiplexing with 1024 inputs was designed and manufactured by stitching due to the length of the chip. The ROIC (XRO3508) includes both correlated double sampling (CDS) and autozero features, enabling a very low Dark Signal Non Uniformity (DSNU) and Photoresponse Non-Uniformity (PRNU) less than 0.5% of the available signal range.