Title :
An 8×8 pixel IC for X-ray spectroscopy
Author :
Krieger, B. ; Ewell, K. ; Ludewigt, B.A. ; Maier, M.R. ; Markovic, D. ; Milgrome, O. ; Wang, Y.J.
Author_Institution :
Lawrence Berkeley Lab., CA, USA
fDate :
6/1/2001 12:00:00 AM
Abstract :
An integrated circuit (IC) providing 64 channels of low-noise signal processing electronics in an 8×8 pixel arrangement has been developed as part of an integrated silicon detector array for high count-rate X-ray spectroscopy applications. Each pixel features low-noise charge integration, programmable peaking time and gain, and an output driver. The 8×8 pixel IC builds upon our previous development of the XPS chip, a 1-dimensional (1-D) preamplifier-shaper IC for linear silicon detector arrays. The new pixel design features significant improvements to the shaper and output driver stages, including digital peaking time and gain selection, and a low-power charge driver/receiver design. When operated with a cooled, low-capacitance silicon detector, an energy resolution of ~210 eV FWHM was obtained for 5.89 keV X-rays. The power dissipation is ~6 mW per pixel at a supply voltage of 3.3 V
Keywords :
X-ray spectroscopy; digital integrated circuits; nuclear electronics; preamplifiers; pulse shaping circuits; 3.3 V; 5.89 keV; 6 mW; Si detector; X-ray spectroscopy; charge integration; energy resolution; gain selection; integrated circuit; peaking time; power dissipation; preamplifier-shaper; Application specific integrated circuits; Array signal processing; Driver circuits; Energy resolution; Power dissipation; Sensor arrays; Silicon; Spectroscopy; X-ray detection; X-ray detectors;
Journal_Title :
Nuclear Science, IEEE Transactions on
