Résumé du preprint DAPNIA-06-343

IDeF-X V1.0 a new sixteen-channel low noise analogue front-end for Cd(Zn)Te detectors
O. Gevin, F. Lugiez, O. Limousin, P. Baron, C. Blondel, X. Coppolani, B.P.F. Dirks, E. Delagnes
Joint progresses in Cd(Zn)Te detectors, microelectronics and interconnection 
technologies open the way for a new generation of instruments for physics 
and astrophysics applications in the energy range from 1 to 1000 keV. Even 
working between 20 and 20C, these instruments will offer high spatial 
resolution (pixel size ranging from 300  300 m to few mm), 
high spectral response and high detection efficiency. To reach these goals, 
reliable, highly integrated, low noise and low power consumption electronics 
is mandatory. Our group is currently developing a new ASIC detector front-end 
named IDeF-X, for modular spectro-imaging system based on the use of Cd(Zn)Te 
detectors. We present the most recent version of IDeF-X which is a sixteen channels 
analogue readout chip intended for use with low capacitive detectors. It has been 
processed with the standard AMS 0.35 m CMOS technology. Each channel consist 
of a CSA, a pole zero cancellation stage, a variable peaking time Sallen & Key type 
filter and an output buffer. The CSA is designed to be DC coupled to detectors having 
a low dark current at room temperature and the compensation stage is continuously self 
adapted to this dark current.


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