Infrared CMOS detector arrays are key to scientific imaging, including Earth remote sensing, astronomy, and planetary exploration. Even as more digital functions are incorporated into CMOS readout integrated circuits-first, with digital-to-analog bias generation and later, with analog-to-digital conversion of the pixel readout-external electronics are still needed to supply these devices with low-noise power and provide suitable data interfaces. This paper describes two implemented designs for such electronics, one for an analog-output detector array, and one for a digital-output array. Both subsystems are intended for planetary infrared imaging spectrometers and output data with similar frame sizes, rates, and bit depth. They include DC-DC conversion from bus power, connection to the detector array through a rigid-flexible printed circuit, data buffering and output through SpaceWire, and commanding over a UART. Due to their similarities in scope and capability, it is meaningful to compare the resources needed by each subsystem. We find that digital-output detectors minimize subsystem mass and volume, but analog-output detectors minimize subsystem power and heat rejection needs. Other trade-offs are also discussed.


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    Title :

    A Comparison of Imaging Subsystems for Analog- versus Digital-Output Detector Arrays


    Contributors:


    Publication date :

    2023-03-04


    Size :

    9196060 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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