Scientific instruments for challenging and cost-optimized space missions have to reduce their resource requirements while keeping the high performance levels of conventional instruments. In this context the development of an instrument front-end ASIC (0.35 micron CMOS from austriamicrosystems) for magnetic field sensors based on the fluxgate principle was undertaken. It is based on the combination of the conventional readout electronics of a fluxgate magnetometer with the control loop of a sigma-delta modulator for a direct digitization of the magnetic field. The analogue part is based on a modified 2-2 cascaded sigma-delta modulator. The digital part includes a primary (128 Hz output) and secondary decimation filter (2, 4, 8,.. 64 Hz output) as well as a serial synchronous interface. The chip area is 20 mm2 and the total power consumption is 60 mW. It has been demonstrated that the overall functionality and performance of the magnetometer front-end ASIC (MFA) is sufficient for scientific applications in space. Noise performance (SNR of 89 dB with a bandwidth of 30 Hz) and offset stability are very satisfying. Only a cross-tone phenomenon must be avoided in future designs even though it is possible to mitigate the effect to a level that is tolerable. The MFA stays within its parameters up to 170 krad of total ionizing dose and it keeps full functionality up to more than 300 krad.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Highly integrated front-end electronics for spaceborne fluxgate sensors


    Additional title:

    Hochintegrierte Front-End-Elektronik für Raumfahrt geeignete Fluxgate-Sensoren


    Contributors:
    Magnes, W. (author) / Oberst, M. (author) / Valavanoglou, A. (author) / Hauer, H. (author) / Hagen, C. (author) / Jernej, I. (author) / Neubauer, H. (author) / Baumjohann, W. (author) / Pierce, D. (author) / Means, J. (author)

    Published in:

    Measurement Science and Technology ; 19 , 11 ; 115801/1-115801/13


    Publication date :

    2008


    Size :

    13 Seiten, 17 Bilder, 3 Tabellen, 21 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Computer simulation of micro-fluxgate sensors [4414-115]

    Sun, L. / Wang, D. / Liu, X. et al. | British Library Conference Proceedings | 2001


    Cryocooler for spaceborne sensors

    CLARK, BENTON / NORMAN, TOM / RASBACH, CHUCK et al. | AIAA | 1988


    Highly reliable spaceborne memory subsystem

    OEY, K. / TEITELBAUM, S. | AIAA | 1981


    Investigation of Driving Direction and Vehicle Position Recognition With Fluxgate Sensors

    Bratschitsch, Emilia / Grüger, Heinrich / Lechner, Thomas | SAE Technical Papers | 2006