Title :
A high resolution 14-bit ADC for Gammasphere Project
Author :
Turko, B.T. ; Arthur, A.A. ; Galvin, J.E. ; Maier, M.R. ; Zizka, G.J.
Author_Institution :
Lawrence Berkeley Lab., California Univ., Berkeley, CA, USA
Abstract :
A system of 110 high-performance ADCs (analog-to-digital converters), required for the Gammasphere Project at the Lawrence Berkeley Laboratory, is described. The ADCs are compact and linear (±0.006% integral, ±0.5% differential), with a conversion deadtime of 6.5 μs and a channel profile flatness of 50%. The converter is based on a new low-power (0.25 W), low-cost, monolithic high-speed sampling ADC, exhibiting a very high stability and no missing codes over the entire 16-bit range. Differential linearity was achieved by applying the Gatti method, covering a 6-b range. Measured data and methods of testing the ADC are also presented
Keywords :
analogue-digital conversion; nuclear electronics; position sensitive particle detectors; semiconductor counters; 0.25 W; 6.5 mus; Gammasphere Project; Gatti method; channel profile flatness; conversion deadtime; differential linearity; high-performance ADCs; testing; Costs; Counting circuits; Crosstalk; Detectors; Laboratories; Linearity; Sampling methods; Stability; Testing; Voltage;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301287
